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Bike > Bikes & Frames > Mountain Bikes
Mountain Bikes Products from Niner

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Niner AIR 9 27.5+ 2-Star GX Eagle Complete Mountain Bike - 2018 Niner AIR 9 27.5+ 2-Star GX Eagle Complete Mountain Bike - 2018
Hardtails are still a hoot and Niner's AIR 9 27. 5+ 2-Star GX Eagle Complete Mountain Bike brings big tires and progressive geometry to the party, proving that you don't have to have rear squish to have fun. Built up with a solid kit, this bike is packed full of value and would make an exceptional first bike or if you're looking to step up your mountain bike game. Niner starts this build with a hydroformed aluminum frame for a lightweight ride with excellent trail feel. Using a multi stage hydroforming process, a straight gauge tube is butted and mechanically formed in preparation for the hydroforming process. Up next is multi-stage hydroforming, which is a series of molds used in sequence to creates complex shapes. Multiple steps might take longer but Niner is able to reduce weight and achieve higher strength. Hydroforming utilizes molds and fluid pressure to form metal tubes into the shapes best suited to the locations on the bike. These molds are created to the desired end shape, and tubes are placed in them while high pressure hydraulic fluid is pumped in causing the tube to expand until it conforms to the desired shape. The 120mm FOX 34 Float Rhythm fork with Grip damper and EVOL air spring provide plush travel at the front and plenty of adjustment for dialing it in for your terrain and riding style. The tapered headtube sits at 68-degrees and lets you hang it out on the descents and still have the ability to pick just the right lines on uphill switchbacks. The stubby 17-inch chainstays let you slalom through the tight trees and makes manualing and wheelies a breeze. Built up in this configuration, this Air 9 features SRAM's GX Eagle 1x12 drivetrain giving you the same wide range as SRAM's higher tier offerings. Should you feel the need to run additional gearing, the frame can accommodate a front sideswing derailleur if bikepacking is in your future. Adding to the versatility, the PF30 bottom bracket shell can house Niner's BioCentric 30 for singlespeed u...
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Niner AIR 9 29 1-Star NX Complete Mountain Bike - 2018 Niner AIR 9 29 1-Star NX Complete Mountain Bike - 2018
Maybe you are just getting into the sport, getting reintroduced after a hiatus, or just looking for a value- packed hardtail to hone some skills this winter and keep bike maintenance to a minimum. If this sounds like you, and you're into the idea of a lightweight, efficient cross country hardtail that can still handle some rugged trails, check out Niner's AIR 9 29 1-Star NX Complete Mountain Bike. The lightweight hydroformed aluminum frame offers a nimble, spirted ride. Hydroforming uses special molds and fluid pressure to form metal tubes into predetermined shapes. To do this, a tube is placed into a negative mold of the desired final shape. Then, high pressure hydraulic fluid is pumped into the aluminum tube, causing it to expand until the tube conforms to the shape of the mold. Taking things even further, Niner uses a multi stage hydroforming process. A straight gauge tube is butted and mechanically formed in preparation for the hydroforming process. Then, using "multi-stage hydroforming" (a series of molds used in sequence), it creates complex shapes. Multiple steps take longer but weight reduction and higher strength and what results. The 120mm RockShox Judy Gold fork and tapered 68-degree headtube angle won't hold you back when gravity starts to pull you down. Short, sub 17-inch chainstays help the bike turn on a dime and get you up and over steep, punchy climbs. Built up here, this Air 9 features SRAM's excellent NX1 1x11 drivetrain offering a wide range of gearing. The frame can run a front sideswing derailleur if you decide that you might need additional gearing or if you plan to do some loaded bike touring later. If you really want to keep things simple and strip off the gears, the PF30 bottom bracket shell can house Niner's BioCentric 30 for singlespeed use. It eliminates the need for adjustable dropouts, offering the cleanest possible solution for singlespeed use. No bolt on hubs. No chain tensioners. No brake adjustments due to gear changes. Adding...
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Niner AIR 9 RDO 2-Star GX Eagle Complete Mountain Bike - 2018 Niner AIR 9 RDO 2-Star GX Eagle Complete Mountain Bike - 2018
While the massive progression of full suspension bikes is remarkable, we think it's always important to keep a place in our hearts --and garages, for a quick and nimble XC-machine. Whether you're getting ready for race day, or setting out to spin over miles of rolling singletrack, the 2018 Niner Air 9 RDO 2-Star GX Eagle Complete Mountain Bike is quick and ready to tackle the trail, and with its updated geometry, boost spacing, and lower bars, it's more capable than ever for picking its way through precarious rock gardens, and powering up long climbs with agility and precision. When the Air 9 saw a makeover in 2017, the most major change we saw was to the handlebar height, dropping it lower, and pushing it into a bit more aggressive positioning, like that of the RKT 9 RDO. When combine with a longer cockpit, and a headtube that moved from steep to moderate, you'll find that the Air 9 RDO handles with agility on quick and unpredictable singletrack, and lunges forward to attack the trail as soon as you tell it to. The chainstays also saw a bit of a squish in, shortening by 4mm to 435mm, allowing quick acceleration that pairs with a snappy rear end that feels controlled and nimble underneath you. The new Air 9 RDO aims at landing between its two predecessors for stiffness, the first, which some may describe as feeling noodly, was often received as being too soft and flexible, while the second was stiff and rough. The happy medium achieved on the new Air 9 RDO comes from a combination of focusing the strength of the frame into the right places, and shedding material where possible, like swapping to a smaller 27. 2mm seatpost diameter, to give you a little flex. In back you'll also find an upgrade that passed through many bikes in 2017--boost spacing. This widened hub that was stretched from 12 x 142 all the way out to 12 x 148 allowed for shortening the stays, stiffening the back end, and even allowing Niner to explore uncharted territory of 27. 5+ wheels. Niner also...
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Niner Air 9 RDO Mountain Bike Frame - 2018 Niner Air 9 RDO Mountain Bike Frame - 2018
The improved geometry of the 2017 Air 9 RDO Mountain Bike Frame is a testament to Niner's unrelenting drive to refine the company's crown jewel of hardtail racing. The Air 9 offers a more aggressive race fit with a lower handlebar height, and the extended cockpit and tapered headtube deliver a nimble frame with precise handling. The Air 9 also delivers the stiffness of a PF30 bottom bracket, and the 148mm Boosted rear axle spacing provides added stability and improved performance with today's wider rims and beefier tires. To give you a more comfortable ride, Niner downsized the seatpost to a more forgiving 27. 2mm. Most importantly, the Air 9 RDO is constructed with Niner's Carbon Compaction System, which reduces excess resin build-up, allowing Niner to use less material and control the thickness of the tube wall across the frame me with the utmost precision. The result is a considerably lighter frame that is stronger and more durable.
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Niner Air 9 RDO Mountain Bike Frame - 2018 Niner Air 9 RDO Mountain Bike Frame - 2018
Destined for crushing miles of rolling singletrack and toeing the line on race day, the Niner 2018 Air 9 RDO Mountain Bike Frame delivers blistering acceleration and nimble handling for ripping across forest networks and blowing the doors off the competition. It's upgraded with Boost rear spacing and tweaked geometry for 2018, making it more capable at holding a line through rugged terrain without sacrificing its razor-like precision. The most notable changes include a lower handlebar height, giving the Air 9 a nudge towards the venerable RKT 9 RDO's aggressive positioning. Paired with a longer cockpit and slacker head tube, this makes for a frame that handles deftly on knife-edge lines and jumps the second you need it to. Compared to the previous Air 9 the chainstays scrunched in by 4mm to 435mm for lightning fast acceleration and nimble handing without crossing over into jumpy, squirrely territory. The new Air 9 RDO also sizes down its seatpost diameter to 27. 2mm to take advantage of that little bit of extra flex and resulting comfort found in a narrower post. Out back, this year's model now boasts another different dimension; namely, a 12 x 148mm Boost axle width, keeping it in line with current trends for wider hubs and stiffer wheelsets. Niner also tucks the brake caliper mounts on the chainstay, neatly within the rear triangle. This makes sense from a frame building standpoint, as the seatstay is generally the burlier of the two rear stays and the placement protects the caliper somewhat in the event of a crash. We also think that particular placement just plain looks better than an ungainly bump hovering above a seatstay. As with Niner's other RDO offerings, the Air 9 RDO is constructed using Niner's Carbon Compaction System (CCS), which gives Niner complete control over tube wall thickness across the frame. This makes for tube walls that are virtually perfect, reduces the amount of materials required, and eliminates excess resin build-up. The result is...
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Niner Jet 9 RDO 27.5+ 2-Star SLX Complete Bike - 2017 Niner Jet 9 RDO 27.5+ 2-Star SLX Complete Bike - 2017
2017 sees some drastic changes to the Jet 9 platform to push the much-loved trail machine into a whole new dimension of versatility. The new Niner Jet 9 RDO 27. 5+ 2-Star SLX Complete Bike is slacker up front, steeper out back, longer across the top, and boasts 20mm more travel than its predecessor to take on ever gnarlier terrain. It also gets 27. 5+ compatibility, as outfitted here, while still retaining the option to swap over to 29in wheels should you want to get some use out of that set gathering dust in your garage. This particular build gets kitted up in Shimano's workhorse SLX drivetrain, with a dropper post and Stan's NoTubes alloy hoops completing a versatile package that's ready to tackle grinding climbs, shred descents, or power through fast, flowy singletrack.As with most bikes in the current trail generation, the key element underwriting the new Jet 9's versatile geometry is its Boost rear axle. Bumping the spacing up to 148mm lets Niner chop 21mm off of chainstays by slamming the rear wheel up into the seat tube. The seat tube contributes to that versatility, too. Despite the fact that the 2017 Jet 9 comes with 140mm of front travel, its seat tube angle nearly identical to the 2016 Jet 9 with a 100mm fork. Adding 40mm up front would typically force you out of the bike's center; however, the new Jet 9's geometry and plus-sized wheels keep you on top of the pedals while the included dropper post allows you to clear out some cockpit space so you can throw the bike around on descents.The bike's updates shine at the front end, too. In 2016, the Jet 9 was limited to a 71 or 70. 5-degree head tube, depending on whether you were running a 100 or 110mm fork. For 2017 (as configured here), it drops to 67 degrees. This puts the Jet 9 right on the cusp of moderate stability and enduro abandon. When paired with the new iteration's longer reach and shorter stem, that angle means the bike can ride roughshod across all manner of trail furniture without sacrifici...
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Niner JET 9 RDO 27.5+ 3-Star GX Eagle Complete Mountain Bike - 2018 Niner JET 9 RDO 27.5+ 3-Star GX Eagle Complete Mountain Bike - 2018
We've been convinced by Niner's ability to dominate the market of 29er bikes for some time, and we'll admit we were a bit shocked by the sudden drift their designers took to adopt the 27. 5+ wheel, but after one ride, we're convinced. The Niner Jet 9 RDO 27. 5+ 3-Star GX Eagle complete mountain bike has managed to capture the trail-ready geometry of a Niner all-mountain bike, with the added plush squish of a plus sized tire. This extra plush-take on the Jet 9 lands you with a bike that soaks up extra blows, and grips corners like it's going out of style, while still riding with the squat-free pedal stroke of CVA suspension. When things started out for Niner Bikes, it was apparent from the name alone that their founders had a strong belief that 29-inch wheels were the superior mode of transportation on a mountain bike, and their designers more or less defined the category of proper 29er geometry. This particular 3-Star GX Eagle build holds true to those roots, but allows for the flexibility to swap to a whole new tire size all together, the 27. 5+. This model comes to you with 27. 5+ wheels, ready to soak up the rocks and sink tread into loose banked turns for secure cornering and a plush ride. Since Boost spacing allowed engineers to widen the hub spacing to a lofty 148mm, the rear end can now charge down the mountain with up to a 27. 5 x 3-inch tire with enough clearance for mud. It's easy to swap the bike back to a 29er, if you feel so inclined, by simply removing an air spring from the fork to drop it 10mm, or removing the 15mm bottom-headset cup. The latest update to the Niner Jet 9 RDO frame moved the speedy XC race geometry, and gave it a bit of a makeover to make it a better all-around trail bike for sending it on the whole mountain. An additional 20mm of travel was added to the Continuously Varying Arc (CVA) rear suspension, which brings the total to 120mm, and added the ability to swap back and forth between 29er and 27. 5+ wheels. The headtube moved a...
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Niner JET 9 RDO 29 1-Star NX Complete Mountain Bike - 2018 Niner JET 9 RDO 29 1-Star NX Complete Mountain Bike - 2018
Niner took what we knew of the original Jet 9 and completely redesigned it sufficiently enough that it went from a cross country race bike to a way more capable trail machine. The JET 9 RDO 29 1-Star NX Complete Mountain Bike not only added more travel but modernized the geometry for composed descending at speed and all-day pedaling on more aggressive trails. The reach is longer, the seattube is steeper, and the headtube is slacker. Those changes make the bike more fun to ride in almost every situation. Whether its technical climbs, chunky descents, or flowing in fast, buff singletrack, the Jet 9 RDO handles it all in stride. This particular build receives SRAM's value packed NX group, KS Lev dropper post, and FOX suspension.Boost rear spacing was instrumental in allowing Niner to alter the geometry and align it with numbers seen on modern trail bikes. Chainstays got wider for clearance and saw 21mm hacked from them so the handling is quick and tight trails are a breeze. The steeper seat tube angle also contributes to the quick handling and helps the pedaling in steep terrain. Your position is now more on top of the pedals putting you in a better attack position and the KS dropper post gets the saddle out of the way making the bike easy to rally on the way down.The updated headtube angle sees a 6 as a starting number for the first time on a Jet at 67. 5-degrees. This hits the sweet spot of high speed stability and keeps it agile enough that the bike doesn't have to be ridden wide open all the time for it to feel alive. The increased reach and short stem increases the bikes responsiveness without losing weight on the front wheel so you don't lose traction in the turns. The Jet 9 continues the nimble handling mantra of Niner's acclaimed geometry while now able to tackle a whole new breed of trails, or your older ones at a higher rate of speed.Thankfully, Niner's Race Day Optimized (RDO) construction process remains unchanged. This is a great, as Niner's carbon p...
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Niner JET 9 RDO 29 2-Star GX Eagle Complete Mountain Bike - 2018 Niner JET 9 RDO 29 2-Star GX Eagle Complete Mountain Bike - 2018
Bouncing back and forth from XC to trail can be tricky on your race-geometry rocket, and many trail bikes are a bit too-slacked out for the agility you want when spinning around your local XC trail network. Enter the redesigned Niner Jet 9 RDO 29 2-Star GX Eagle Complete Mountain Bike. Redesigned for 2018, with slacker angles than before, so you can send it down gnarlier trails and gobble up rocks that would have sent you flying in past years, this trail-ready bike combines some of the agility of its XC jet-pack roots with the growing demand riders have for longer and lower geometry to dominate the whole mountain. When things started out for Niner Bikes, it was apparent from the name alone that their founders had a strong belief that 29-inch wheels were the superior mode of transportation on a mountain bike, and their designers more or less defined the category of proper 29er geometry. This particular 2-Star GX Eagle build holds true to those roots, but allows for the flexibility to swap to a whole new tire size all together, the 27. 5+. It comes stock with Niner's own 29-inch alloy hoops, so you'll have the quick rolling readiness of a 29er, but with the coming of Boost 148mm rear hub spacing, the hub is widened and creates the room you need to throw on a smaller rim with a beefier tire, should you be feeling experimental, or just want to find out what this whole 27+ craze is all about. The latest update to the Niner Jet 9 RDO frame moved the speedy XC race geometry, and gave it a bit of a makeover to make it a better all-around trail bike for sending it on the whole mountain. An additional 20mm of travel was added to the Continuously Varying Arc (CVA) rear suspension, which brings the total to 120mm, and added the ability to swap back and forth between 29er and 27. 5+ wheels. The headtube moved a bit slacker, the seattube steeper, and the reach stretched out a bit longer, making the Jet 9 a much more trail-hungry beast than in previous years. For those worrie...
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Niner Jet 9 RDO 3-Star XT Complete Bike - 2017 Niner Jet 9 RDO 3-Star XT Complete Bike - 2017
It's not a far stretch to say that the Niner engineers went back to the drawing board and rebuilt the Jet 9 from the ground up. Similar in name but drastically different in geometry, the 2017 Niner Jet 9 RDO 3-Star XT Complete Bike goes much further than merely adding travel. It's longer across the top, steeper out back, slacker up front, and better at just about everything that made the original Jet 9 such a standout. Whether you're grinding climbs, bombing descents, or reveling in fast, flowy singletrack, the Jet 9 RDO lives up to its versatile reputation. This particular build gets kitted up in Shimano's lauded XT componentry, a dropper post, and Stan's NoTubes Arch MK3 hoops. As with most bikes in the current trail generation, the key element underwriting the new Jet 9's versatile geometry is its Boost rear axle. Bumping the spacing up to 148mm lets Niner chop 21mm off of chainstays by slamming the rear wheel up into the seat tube. The seat tube contributes to that versatility, too. Despite the fact that the 2017 Jet 9 comes with 130mm of front travel, it's got the same seat tube angle as the 2016 Jet 9 with a 100mm fork. Adding 30mm up front would typically force you out of the bike's center; however, the new Jet 9's geometry keeps you on top of the pedals while the included dropper post allows you to clear out some cockpit space so you can throw the bike around on descents. The bike's updates shine at the front end, too. In 2016, the Jet 9 was limited to a 71 or 70. 5-degree head tube, depending on whether you were running a 100 or 110mm fork. For 2017 (as configured here), it drops to 67. 5 degrees. This puts the Jet 9 right on the cusp of moderate stability and enduro abandon. When paired with the new iteration's longer reach and shorter stem, that angle means the bike can ride roughshod across all manner of trail furniture without sacrificing responsive steering. Slack head tubes are fun, but we're occasionally frustrated by their muddy responsiveness....
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Niner JET 9 RDO Mountain Bike Frame - 2018 Niner JET 9 RDO Mountain Bike Frame - 2018
The latest Niner Jet RDO Mountain Bike Frame reboot took what we knew of the XC race rocket Jet, and gave it a facelift adding some features making it a better all-around trail bike. Niner added 20mm of additional travel to the Continuously Varying Arc (CVA) rear end bringing the total to 120mm and added the ability to swap back and forth between both 29er and 27. 5+ wheels. The headtube is now slacker, the seattube is steeper, reach has gotten longer, and all-in-all made the Jet an awesome mid-travel machine while the RKT steps in as the XC racehorse. We love the change and after just one ride, think you will too.The move to boost spacing allows Niner to update the geometry and by doing so, they hacked 21mm off of the chainstays moving the rear wheel underneath the rider. This contributes to quick climbing and handling, not lost from the original Jet, despite the longer travel. The steep seat tube angle also contributes here. Niner recommends paring a 130mm for 29-inich wheels and 140mm with 27. 5+ and despite the slacker front end, the seat tube angle remains similar to the older, steeper Jet 9 with its shorter travel fork. The steeper seattube keeps you on top of the pedals for more efficient pedaling, more intuitive handling, and prevents you from feeling like you threw a leg over a chopper.With the recommended fork length for 29 and 27. 5+ wheels the respective headtube angles sit at either 67. 5 or 67 degrees. In practice, that angle strikes a happy medium between a quick and agile trail machine and one that continues to add confidence as both speed and gradient increase. The move to a longer reach paired with a shorter stem lengthens the wheelbase so you won't think twice hucking the bike into a nasty rock garden, yet steers quick enough getting you through uphill and downhill switchbacks with ease.One thing that does remain the same on Niner's Race Day Optimized (RDO) frames are the materials and construction processes. Niner's compaction method squeez...
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Niner Jet 9 RDO SLX Fox Complete Bike with Stan's NoTubes Wheels Niner Jet 9 RDO SLX Fox Complete Bike with Stan's NoTubes Wheels
Let's face it, we could all use a bit more confidence when holding a line through chunky sections of trail, pedaling up a steep climb with technical moves, and dropping into fast descents where mistakes are costly. Realizing the modern trail rider is seeking something a bit more capable than the XC whippets of yesteryear, the savvy folks at Niner designed the Jet 9 RDO SLX Fox Complete Bike with confidence-inspiring geometry, so you can focus on having a blast on the trail, instead of merely making it down alive. The newest version sports 4. 7in of efficient, yet plush CVA suspension paired with a 5in Fox 34 Factory Fork to smooth out the rough stuff as you plunge into wicked descents. As you'd expect with modern trail bikes moving towards the aggressive end of the riding spectrum, the newest Jet 9 RDO is both slacker and longer than the previous generation for greater composure when the trail gets steep and rocky. You'll find the 67. 5-degree head tube angle strikes the sweet spot between light, precise steering inputs and high-speed confidence on the descent. Even though it's generously long in reach figures, the Jet 9 RDO is shorter in the chainstays, lending snappy handling when you're railing around sweeping berms and quickly changing direction to avoid obstacles. Overall, the Jet 9 RDO lives up to Niner's reputation of nimble wagon-wheel machines designed for riding fast and having fun. Another aspect of the redesign for the current generation of Jet 9 RDO lies in its ability to accept the voluminous rubber of 27. 5+ wheels, thanks to its Boost rear axle spacing. Bumping up the spacing to 148 millimeters enables the Jet 9 RDO to readily accept massive 3in tires should you feel the need to add another wheel size to your arsenal. If you're content with the provided 29in wheels, you'll find the frame clears a 29 x 2. 4in tire without issue, which remains standard for the rider seeking optimal grip and rolling speed without getting floppy in corners. Despite...
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Niner RIP 9 RDO 2-Star SLX Complete Mountain Bike - 2017 Niner RIP 9 RDO 2-Star SLX Complete Mountain Bike - 2017
For 2017, Niner's RIP 9 RDO 2-Star SLX Complete Mountain Bike resembles the previous iteration in name only. In fact, it almost resembles 2016's WFO more than the RIP that it's at least nominally replacing. The suspension is deeper, the head tube is slacker, the seat tube steeper, and chainstays stubbier, and the top tube longer--all of which puts it in a class capable of moving freely between trail and enduro. Some call this impossible; some call it versatile; we call it all-mountain; and Niner calls it the only possible way to improve on the previous RIP 9. Whatever you call it, the new RIP 9 owes much of its come-all-ye capabilities to the introduction of Boost axle spacing. By bumping the rear axle out to 148mm, Niner was able to buy enough clearance at the bottom bracket to shorten the chainstays and sharpen the seat tube angle by 11mm and two degrees, respectively. These subtle changes make the rear triangle that much more responsive to input while also pushing the rider's engine up over the pedals. The stubby stays also keep the bike agile, but with a 67-degree head tube and 160mm of Lyrik forgiveness up front, it's just as happy to try flattening everything in its path--or at least bailing you out when your lines start to get a bit too ambitious. In the event that discretion wins the day, the RIP 9's longer top tube and short stem keep handling on-point, despite that low head tube angle, so you can always fall back on those dicey stays to navigate stretches of especially techy terrain. Either way, take solace in knowing that most of the bike's angles are similar to the WFO even though it maintains the precise handling of its predecessor. Given that mixed pedigree, the new RIP 9 enjoys playing in rock gardens as much as barreling over horst and graben rootscapes. So there's obviously a lot of new radness with the RIP 9, but two things remain felicitously unchanged: the Race Day Optimized (RDO) construction method and the Constantly Varying Arc (CVA) suspe...
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Niner RIP 9 RDO 27.5+ 2-Star GX Eagle Complete Mountain Bike - 2018 Niner RIP 9 RDO 27.5+ 2-Star GX Eagle Complete Mountain Bike - 2018
Some were surprised when Niner eschewed from the wheelsize that has emblazoned its downtube since their inception. The truth is, 27. 5 Plus' overall diameter isn't that different from 29ers and the added girth makes them so plush, and so grippy, if they fit in the frame and fork, why not try them out' Along with the redesigned Jet, the RIP 9 RDO 27. 5+ 2-Star GX Eagle Complete Mountain Bike sees many upgrades including the ability to work with dual wheel sizes and more modern geometry. Slacker headtube, longer reach, and wheelbase, and steeper seatube have the new RIP 9 willing and able to gobble up steep chunder and daftly pick a line through tight, technical singletrack. This build gets SRAM's workhorse GX Eagle drivetrain, KS LEV dropper post, and Rock Shox Yari fork and FOX Float shock for all-mountain trail and enduro performance.The frame's versatility comes courteous of the Boost rear spacing. By widening the dropout spacing to 148mm, Niner was able to find enough clearance at the bottom bracket to shorten the chainstays by 11mm. The other trick in modern mountain bike geometry is to steepen the seattube to properly weight the front end and place you, the rider, in a more powerful pedaling position. Niner goes 2. 5-degrees steeper and this helps the big bike pedal way better than a 6-inch bike should. Dropping the post when going downhill gets the saddle out of your way for added control and confidence.The short rear end keeps the bike nimble, but with a 66. 5-degree head tube and 170mm of FOX fork up front, it's doesn't mind plowing down the trail and offers a comfortable margin of error if lines get a bit hairy. The longer reach and short stem keep the handling intuitive, despite the aggressive demeanor, and you'll quickly learn that you can huck into some pretty gnarly terrain and get out of it intact.Despite the changes to the geometry Niner continues with their patented Constantly Varying Arc (CVA) suspension platform and Race Day Optimized (RDO) c...
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Niner RIP 9 RDO 27.5+ 2-Star SLX Complete Bike - 2017 Niner RIP 9 RDO 27.5+ 2-Star SLX Complete Bike - 2017
Niner's breaking tradition and expanding its options with the 2017 RIP 9 RDO 27. 5+ 2-Star SLX Complete Bike. Yes, you read that right. 27. 5+. That wheel and tire pairing is so nimble, so plush, and so grippy that we suppose it was only a matter of time. The frame itself is also somewhat expanded. Simultaneously slacker, longer, and even more responsive on climbs, the RIP 9's [R]Evolution geometry boasts the versatility to shred rock gardens and technical descents as eagerly as it scales steep grades. This build is kitted up with Shimano's workhorse SLX drivetrain, a dropper post, and Stan's NoTubes hoops to expand your definition of fun on the trail. The frame's versatility is heavily influenced by its Boost axle spacing. By bumping the rear axle out to 148mm, Niner was able to buy enough clearance at the bottom bracket to shorten the chainstays and sharpen the seat tube angle by 11mm and 2. 5 degrees, respectively. These subtle changes make the rear triangle that much more responsive to input while also pushing the rider's engine up over the pedals. The stubby stays also keep the bike agile, but with a 67-degree head tube and 170mm of RockShox forgiveness up front, it's just as happy to try flattening everything in its path--or at least bailing you out when your lines start to get a bit too ambitious. In the event that discretion wins the day, the RIP 9's longer top tube and short stem keep handling on-point, despite that low head tube angle, so you can always fall back on those dicey stays to navigate stretches of especially techy terrain. There's obviously a lot of new radness with the RIP 9, but two things remain pleasantly unchanged: the Race Day Optimized (RDO) construction method and the Constantly Varying Arc (CVA) suspension design. RDO involves a dual-compression process that eliminates resin pooling and allows precise control over wall-thickness. Reducing imperfections makes for a more structurally sound frame, and the targeted control over lay-up ...
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Niner RIP 9 RDO 27.5+ 3-Star XT Complete Mountain Bike - 2017 Niner RIP 9 RDO 27.5+ 3-Star XT Complete Mountain Bike - 2017
For 2017 RIP 9 RDO 27. 5+ 3-Star XT Complete Mountain Bike, Niner took what was arguably the ultimate in trail bikes and threw in some tweaks to push it even further into the all-mountain realm. In doing so, it also ushers in 27. 5+ tires, an act of heresy that only makes sense in the Niner genre when you step back and see the similarity in circumference between that classic 29er tire and the smaller-wheeled, yet decidedly donut-sized 27. 5+ rabble-rouser. All at once Longer, slacker, and paradoxically more responsive on climbs, the RIP 9's versatile [R]Evolution geometry shreds rock gardens as eagerly as it scales steep grades. This build gets dressed up in Shimano's precisely-shifting workhourse XT drivetrain, a dropper post, and Stan's NoTubes hoops for a whole new level of fun in the dirt. The frame's versatility is heavily influenced by its Boost axle spacing. By bumping the rear axle out to 148mm, Niner was able to buy enough clearance at the bottom bracket to shorten the chainstays and sharpen the seat tube angle by 11mm and 2. 5 degrees, respectively. These subtle changes make the rear triangle that much more responsive to input while also pushing the rider's engine up over the pedals. The stubby stays also keep the bike agile, but with a 67-degree head tube and 170mm of Lyrik forgiveness up front, it's just as happy to try flattening everything in its path--or at least bailing you out when your lines start to get a bit too ambitious. In the event that discretion wins the day, the RIP 9's longer top tube and short stem keep handling on-point, despite that low head tube angle, so you can always fall back on those dicey stays to navigate stretches of especially techy terrain. There's obviously a lot of new radness with the RIP 9, but two things remain pleasantly unchanged: the Race Day Optimized (RDO) construction method and the Constantly Varying Arc (CVA) suspension design. RDO involves a dual-compression process that eliminates resin pooling and allows...
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Niner RIP 9 RDO 27.5+ 5-Star Eagle X01 Complete Mountain Bike - 2017 Niner RIP 9 RDO 27.5+ 5-Star Eagle X01 Complete Mountain Bike - 2017
If the 2016 iteration of Niner's RIP 9 is the ultimate trail bike, then its completely reimagined successor expands that empire to also include the all-mountain realm--but it does so through a decidedly heretical act. The RIP 9 RDO 27. 5+ 5-Star Eagle X01 Complete Mountain Bike multiplies every aspect that made its predecessor so successful. Longer, slacker, and yet inexplicably more responsive on climbs, the RIP 9's confusingly versatile [R]Evolution geometry chews up rock gardens as eagerly as it cleans steep grades. And that's all well and good, but Niner has done the unthinkable by combining it with 27. 5+ wheels. The result of this unholy coupling is a delightfully playful bit of wagon-wheel heresy that we're happy to indulge. Before we dive deeper into the frame, though, we'll linger briefly on the build kit, which centers on 27. 5+ (Shock! Horror!) ENVE HV wheels and SRAM's shiny new Eagle X01 12-speed drivetrain. With the addition of a 50t granny cog, Eagle offsets the bike's 27. 5 heresy with a climbing benediction when you find yourself out of gas, out of mettle, but not yet out of the woods, climbing-wise. The X01 version may not have the glitzy qualities of XX1, but the frame's devilish versatility will steal the show as soon as rubber hits dirt, anyway. And this frame is versatile--a quality that it owes in large part Boost axle spacing. By bumping the rear axle out to 148mm, Niner was able to buy enough clearance at the bottom bracket to shorten the chainstays and sharpen the seat tube angle by 11mm and 2. 5 degrees, respectively. These subtle changes make the rear triangle that much more responsive to input while also pushing the rider's engine up over the pedals. The stubby stays also keep the bike agile, but with a 67-degree head tube and 170mm of Lyrik forgiveness up front, it's just as happy to try flattening everything in its path--or at least bailing you out when your lines start to get a bit too ambitious. In the event that discretion wins t...
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Niner RIP 9 RDO 3-Star XT Complete Mountain Bike - 2017 Niner RIP 9 RDO 3-Star XT Complete Mountain Bike - 2017
Niner's RIP 9 RDO 3-Star XT Complete Mountain Bike got quite the facelift for 2017. It now boasts a deeper suspension, slacker head tube, steeper seat tube, stubbier chainstays, and a longer top tube, helping it span the gap between its trail heritage and your enduro aspirations. Kitted out with Shimano's XT drivetrain, a dropper post, and Stan's NoTubes hoops, the RIP 9's newly found all-mountain versatility takes its much-loved predecessor's capabilities to an entirely new level. In addition to the geometry tweaks, the new RIP 9 owes much of its versatility to the introduction of Boost axle spacing. By bumping the rear axle out to 148mm, Niner was able to buy enough clearance at the bottom bracket to shorten the chainstays and sharpen the seat tube angle by 11mm and two degrees, respectively. These subtle changes make the rear triangle that much more responsive to input while also pushing the rider's engine up over the pedals. The stubby stays also keep the bike agile, but with a 67-degree head tube and 160mm of Lyrik forgiveness up front, it's just as happy to try flattening everything in its path--or at least bailing you out when your lines start to get a bit too ambitious. The RIP 9's longer top tube and short stem keep handling on-point, despite that low head tube angle, so you can always fall back on those stubby stays to navigate stretches of especially technical terrain. There's clearly a lot of new radness with the RIP 9, but two things remain pleasantly unchanged: the Race Day Optimized (RDO) construction method and the Constantly Varying Arc (CVA) suspension design. RDO involves a dual-compression process that eliminates resin pooling and allows precise control over wall-thickness. Reducing imperfections makes for a more structurally sound frame, and the targeted control over lay-up and wall thickness lets Niner buttress that structure where appropriate and reduce material where it'll save weight without sacrificing stiffness. The result marks the n...
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Niner RIP 9 RDO Mountain Bike Frame - 2018 Niner RIP 9 RDO Mountain Bike Frame - 2018
The new Niner RIP 9 RDO Mountain Bike Frame got some serious upgrades and share very little with its predecessor other than its name. A slacker head tube, steeper seat tube, longer reach, shorter chainstays, and a touch more travel, the new RIP 9 RDO increases its trail aggression and transitions well for enduro stages and big shuttle days. The frame also deviates from Niner's 29-inch wheel dedication and offers compatibility for both 29in and 27. 5+ wheels to suit your riding and terrain.The boost spacing affords the geometry tweaks and the ability to run both wheel sizes. Boost spacing also builds stiffer wheels, benefiting larger diameter hoops, and a stiffer rear end. By widening the dropouts to 148mm, Niner was able to free up enough clearance between the chainstays to shorten them 11mm. These changes translate to a rear triangle that's much nimbler to rider input and quicker through tight trails.The short stays keep the bike quick and the slack head tube lets the RIP live up to its name as it will absolutely plow through anything in its path and encourage you to stay off the brakes. The RIP can go as slack as 66. 5 degrees with a 170mm fork. Its long reach and requisite short stem and wide bar keep handling quick and dismays the typically lazy handling often found with slack head tube angle. We found that the bike wants us to get into all kinds of high-speed danger and allows for an amazing margin of error giving us confidence to progress. The RIP 9 RDO continues with Race Day Optimized (RDO) carbon compaction construction methods in which carbon plies are cured under intense pressure to ensure proper wall thickness and minimize strength sapping voids. This also flushes out excess resin producing a remarkably resilient structure and matches the engineering specifications for strength, durability and weight, as well as looking super clean and stealthy. The Constantly Varying Arc (CVA) suspension design remains unchanged, but adds 25mm more travel, bringin...
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Niner RIP 9 RDO SLX Fox Complete Bike - with Stans Wheels Niner RIP 9 RDO SLX Fox Complete Bike - with Stans Wheels
Easily the most capable machine in Niner's line, the RIP 9 RDO SLX Fox Complete Mountain Bike blurs the line between aggressive trail machine and brawny enduro sled with its steamrolling 29er wheels paired with 150-millimeters of plush CVA suspension and a long, slacked-out geometry that screams of confidence when the trail gets fast and rowdy. This particular version is kitted out with the workhorse dependability of a Shimano SLX drivetrain, alongside a 160mm Fox 36 Factory Fork for rock-devouring confidence and a RockShox Monarch Plus RC3 shock for luxury car-like plushness out back. As you'd expect from modern trail bikes pushing towards the longer and slacker end of the riding spectrum, the RIP 9 RDO has a long-reach, roomy cockpit paired with a shorter stem for quick-handling confidence when you're maneuvering around trail obstacles and cleaning tight switchbacks. The 67-degree head tube angle gives the RIP 9 RDO a balanced feel that's both confident at charging bigger lines, yet one that retains nimble handling along sweeping berms and tight sections of trail--both areas where long-travel 29ers are usually lacking in adeptness and skill. Another figure to note is its relatively steep 75. 5-degree seat tube angle, which places you in an optimal position to lay power down on tricky climbs. Another aspect of the latest redesign for the RIP 9 RDO lies in its ability to accept the voluminous rubber of 27. 5+ wheels thanks to its Boost rear axle spacing. Increasing the rear axle to 148mm enables the RIP 9 to readily accept massive 2. 8in tires should you feel the need to add another wheel size to your riding arsenal. If you're content with the provided 29-inch wheels, you'll find it easily clears a 29 x 2. 4in rear tire, which defines the new standard for aggressive trail riders seeking a balance between rolling speed and grip. Despite all of the changes above, Niner's Race Day Optimized (RDO) construction process remains the same as previous versions and model...
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Niner RKT 9 RDO 2-Star GX Eagle Complete Mountain Bike - 2018 Niner RKT 9 RDO 2-Star GX Eagle Complete Mountain Bike - 2018
Niner knows 29ers. Running the gamut from XC to enduro, it builds bikes that simply excel in the discipline that it is designed. The company recently updated the Jet, which was previously its XC weapon of choice, into more of a trail bike which left the door wide open for a new cross-country bike. Enter the RKT RDO, an outright fast short travel machine that's got its eyes focused on the podium whether that's a short track event or a 24h solo race. The RKT 9 RDO 2-Star GX Eagle Complete Mountain bike represents an excellent value that won't hold you back once the starting gun is fired. The carbon frame is born to efficiently get you from point A to B as quickly as possible, and the 120mm fork and 90mm of squish in the rear are an excellent asset on technical race courses or weekend trail rides. Boost spacing helps improve the stiffness and you'll own every line and corner. Hope on the new RKT and you'll be climbing your fair share of mountains and podiums.It's difficult to build a bike that blends the perfect attributes we want in a race bike that doesn't lean too heavily towards a twitchy, nervous race bike or a heavy inefficient beast. Niner's expertise in exclusively building big wheel bikes gives it the experience needed to find this balance and we are sure after one ride you will agree. The geometry is progressive using a short head tube paired with a long reach putting you in the perfect position to pick highspeed lines through rock gardens. Boost spacing and a super low standover height add to the responsive ride and let the bike remain agile in tight singletrack. Chainstays are a shortish 439mm, and when paired with the steep seattube angle helps scale the steepest walls and punchiest climbs. Off the race course, the RKT can tackle some pretty serious terrain too and clearance for up to a 2. 6-inch tire can get this bike into some fun terrain.The carbon fiber construction is as race optimized as the geometry. Niner uses its RDO Carbon Compaction System ...
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Niner RKT 9 RDO 3-Star XT 1x Complete Mountain Bike - 2018 Niner RKT 9 RDO 3-Star XT 1x Complete Mountain Bike - 2018
If you've ever caught yourself daydreaming deeply about the perfect bike on your way home from a ride, building one in your mind from the ground up with XC energy, a spirited disposition, but the ability to crush lines most assume are off-limits for the XC set, you're in luck. Sometimes, dreams do come true. As an plush XC bike with a podium-chasing attitude, the RKT 9 RDO 3-Star XT is a shining example of what pushing the limits of XC looks like. Let us clarify. In the case of the RKT 9, that means combining an energetic carbon frame, 120mm of squish for technical race courses or weekend exploration, and the proven efficiency of Boost spacing. Whether you're venturing onto shady, root-encrusted trails or putting it all on the line on raceday, trust the RKT 9's disarmingly playful attitude to match your enthusiasm at every turn. The Queen of Pain herself, known simply as Ms. Rusch off-trail, has summarized the RKT 9 RDO as the answer to her dreams, which means that Niner's goal of blending a twitchy race bike with a fearless bruiser of a trail beast wasn't too much of reach. On the contrary, the RKT 9 RDO fulfills that description uncannily well, using a short head tube and longer top tube to provide line cleaning confidence up front, and Boost spacing with the lowest standover height in Niner's line for a boundless supply of snappy aggression in the rear. Boost spacing allowed Niner to chop the chainstays to a stubby 439mm, which when paired with that low standover height, results in agile cornering and power-transferring stiffness. When the opportunity to spend a weekend chasing your armor-clad pals and their 5-inch monsters around rugged singletrack presents itself, one look at the RKT 9 RDO will be enough to tell you the answer is yes. Though geometry is a big part of the RKT 9 RDO's story, its carbon frame cannot be overlooked. Niner uses its RDO Carbon Compaction System (CCS) to ensure details like wall thickness and material distribution are flawless, el...
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Niner RKT 9 RDO 5-Star X01 Eagle Complete Mountain Bike - 2018 Niner RKT 9 RDO 5-Star X01 Eagle Complete Mountain Bike - 2018
You've been taking hardtails onto downhill-only singletrack since you first started biking, and somehow, not having the funds for a 6-inch enduro monster right off the bat translated into a love affair with XC that you'd never walk away from now. Though your passion for XC hasn't faded, your relationship with it has grown with time, and rather than a hardtail with just a little squish up front, you expect a little more from your bike these days. Devour bumps, clean race courses, and dive into big lines with more plushness than your younger, hardtail-riding self could've dreamed of with Niner's RKT 9 RDO 5-Star Mountain Bike. Kitted out with the drivetrain of the self-sponsored cyclist's dreams and continuing to reap the rewards of a smart redesign in 2016, the RKT 9 RDO is ready to take your relationship with XC to towering heights. When redesigning the RKT for 2016, Niner started with the task of trying to bridge the gap between low-weight XC race machines and high-confidence, line-holding trail sleds. It hit its mark last year with such precision that for 2017, the brand's made no changes to the impressive frame. That means you'll still get to take advantage of the long-and-low swagger of the front end when heading into chunky spots, with over four-and-a-half inches of squish and the line-holding confidence that 29er tires are bred with backing you up. The use of Boost axle spacing in the front and rear also gave Niner the opportunity to slam the back wheel up and reduce the chainstays to a stubby 439mm. That, paired with the RKT 9 RDO's low standover height, translates to agile, aggressive cornering and acceleration from the race course to shuttle laps. Niner shapes this do-it-all carbon fiber frame carefully using its RDO Carbon Compaction System (CCS) for a precise, flawless result. Using CCS, Niner builds a frame with as little excess material as possible, hitting stiffness marks without compromise while eliminating structural imperfections and inconsiste...
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Niner RKT 9 RDO Mountain Bike Frame - 2018 Niner RKT 9 RDO Mountain Bike Frame - 2018
Clipping into Niner's RKT 9 RDO Mountain Bike Frame brings back fond memories of a time when XC was king and frame geometry wasn't so heavily influenced by slacked out gravity sleds. Niner's paraphrased goal in creating the RKT 9 RDO was to build a 3. 5in chassis that handles terrain like a five-inch bike but still climbs like an XC rocket, resulting in a 29in platform every bit as race-ready as any 27. 5in trail machine. On moderate terrain, speed is definitely the RKT's friend. It's easy to choose a gear and choose a line, trusting that the suspension's capability will carry you across rock-strewn trails and through corners with a nimbleness that we've rarely experienced on 29in wheels. Given that it's an XC race bike, Niner tweaked the RKT 9 RDO's CVA travel to hit the sweet spot of low-travel speed. In its initial stroke, the RKT's CVA suspension focuses on maintaining a firm, responsive pedaling platform. Even while riding the shock open, CVA encourages speed on rocky, root-latticed climbs. As roll overs and light rock gardens usher the travel into the mid stroke, CVA also embraces trail furniture without sacrificing momentum or straying from its line. As it hits the end of its 90mm, the travel ramps up to avoid harsh bottom-outs, extending the margin of error just a bit further for when enduro ambitions start to get the better of XC restraint. The frame is built according to the specifics of Niner's RDO Carbon Compaction System (CCS). CCS uses internal molds during the curing process to ensure precise control over wall thickness and material distribution, eliminating excess grams and structural imperfections like resin pooling. The geometry presents a few departures from Niner's typical recipe, including a longer effective top tube and a lower head tube. These adjustments net a lower, more aggressive rider position that incorporates some stabilizing elements of longer enduro geometries for an XC race machine that holds lines with no extra weight or sluggi...
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Niner SIR 9 27.5+ 3-Star XT Complete Mountain Bike - 2017 Niner SIR 9 27.5+ 3-Star XT Complete Mountain Bike - 2017
One of the most versatile and smooth-riding hardtails on the market, the Niner SIR 9 27. 5+ 3-Star XT Complete Mountain Bike features the supple characteristics of Reynolds 853 steel construction paired with modernized trail geometry, 27. 5+ wheels for massive traction and rock-smoothing compliance, and 18 mounting points for bikepacking adventures. Whether you're seeking a steel hardtail for spirited rides in the mountains or a dependable pack mule for long-distance adventures, the SIR 9 satisfies your itch for exploration with its simplicity, strength, and smooth-riding characteristics. Making it even more versatile, the SIR 9 easily swaps the included 27. 5+ wheels for the momentum-carrying abilities of its 29-inch brethren. This is especially important, as it lends adaptability for varying trail ecosystems and riding disciplines. By now, you're probably aware the bike industry is constantly pushing the envelope on geometry, with things becoming slacker and longer to accommodate aggressive riding styles. The SIR 9 eagerly follows this modernized trail geometry with its longer top tube and shorter chainstays, which make the bike's handling all the more lively around corners and stable at high speeds. The wheelbase is longer as well, inspiring you to push the envelope when it comes to carrying speed on extended descents. Paired with the provided 120-millimeter Reba RL Solo Air fork, the SIR 9 moves from a rather XC-focused head tube angle of 70 degrees (on previous model) to a trail-worthy 68 degrees. This gives you added confidence to attack steep descents and technical trail sections previously on the edge of the old bike's comfort zone. Although it's slacker than ever, it still pedals and climbs with resounding efficiency, as Niner engineered it with a steeper 74-degree seat tube angle, which places you in an optimal pedaling position. It's no surprise the SIR 9 retains the supple ride quality of its Reynolds 853 steel construction, especially seeing its n...
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Niner SIR 9 29 2-Star SLX Complete Mountain Bike - 2017 Niner SIR 9 29 2-Star SLX Complete Mountain Bike - 2017
The Niner SIR 9 29 2-Star SLX Complete Mountain Bike is one of the most versatile hardtails on the market with its supple Reynolds 853 steel construction paired with modernized trail geometry, 29-inch wheels for steam-rolling capabilities, and 18 mounting points for bikepacking adventures. Whether you're seeking a steel hardtail for spirited rides through the local mountains or a dependable pack mule for long-distance adventures, the SIR 9 satisfies your itch for exploration with its simplicity, strength, and unmatched versatility. The customization doesn't stop there, with the SIR 9 swapping the momentum-carrying, obstacle-rolling 29er wheels for the voluminous traction and bump-smoothing ride of 27. 5+ wheels. This is a great feature, as you can swap wheel sizes at a moment's notice to accommodate different trails and riding disciplines. Since the bike industry is constantly evolving, it makes perfect sense that Niner designed the latest SIR 9 with their [R]evolution trail geometry, which makes the bike longer in the top tube and shorter in the chainstays. This redesign gives the SIR 9 a lively personality that's quick to turn through tight switchbacks and sweeping berms, as well as making it roomier in the cockpit, so you're well-balanced and comfortable across long distances. The longer wheelbase inspires confidence when you open it up at higher speeds without it ever feeling twitchy or unnerving when pushed to the limit. Paired with the provided Reba RL Solo Air fork with 120-millimeters of travel, the SIR 9 moves from a rather XC-focused head tube angle of 70 degrees (for the previous model) to a more trail-worthy 68 degrees. This gives you added confidence to attack fast descents and technical sections previously on the edge of the old bike's comfort zone. Although it's slacker than ever, the SIR 9 still pedals and climbs with resounding efficiency, as Niner designed it with a seat tube angle of 74-degrees, which places you in an optimal position for lay...
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Niner SIR 9 29 5-Star X01 Eagle Complete Mountain Bike - 2018 Niner SIR 9 29 5-Star X01 Eagle Complete Mountain Bike - 2018
One of the most versatile hardtails on the market, the Niner SIR 9 29 5-Star XO1 Eagle Complete Mountain Bike features smooth and supple Reynolds 853 steel construction paired with modernized trail geometry, 29-inch wheels for momentum-carrying speed, and 18 mounting points for bikepacking adventures. Whether you're seeking a steel hardtail for spirited rides through the local mountains or a dependable pack mule for long-distance adventures, the SIR 9 satisfies your itch for exploration with its simplicity, strength, and unmatched versatility. The versatility doesn't stop there, with the SIR 9 swapping the momentum-carrying 29er wheels for the voluminous traction and bump-smoothing feel of 27. 5+ wheels. This is especially great, as you can swap tire sizes at a moment's notice for different trail systems and riding disciplines. It's no secret the bike industry is constantly evolving, so it makes perfect sense that Niner would modernize the previous SIR 9's geometry into something a little bit more trail-oriented. Niner's [R]evolutionary trail geometry makes the SIR 9 longer in the top tube and shorter in the chainstays for lively handling on the trail and a roomier cockpit, which facilitates composure on descents and comfort across long distances. The longer wheelbase of the SIR 9 inspires confidence when you're pushing it at higher speeds on the downhill portion of your ride. Paired with the FOX 34 Float Factory fork with 120-millimeters of travel, the SIR 9 moves from a rather XC-focused head tube angle of 70-degrees (for the previous model) to a trail-worthy 68-degrees. This gives you added confidence to attack fast descents and technical sections previously on the edge of the old bike's comfort zone. Although it's slacker than before, it still pedals and climbs with resounding efficiency, as Niner engineered it with a steeper 74-degree seat tube angle, which places you in an optimal pedaling position. Seeing that its name comes from the catchy phrase "Stee...
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Niner SIR 9 Mountain Bike Frame - 2018 Niner SIR 9 Mountain Bike Frame - 2018
Reincarnated for 2018, the Niner SIR 9 Mountain Bike Frame is one of the most versatile hardtails on the market thanks to its supple Reynolds 853 steel construction paired with modernized trail geometry, the ability to run 29-inch or 27. 5+ wheels, and 18 mounting points for bikepacking adventures. Whether you're seeking a steel hardtail for spirited rides through the local forest or you're looking for a dependable pack mule for long-distance adventures, the SIR 9 satisfies your itch for exploration with its simplicity, strength, and unmatched versatility. The customization doesn't stop there, with the SIR 9 accommodating both geared and singlespeed drivetrains, although singlespeeds require Niner's Biocentric 30 (not included). Seeing that the bike industry is ever-evolving, it makes perfect sense that Niner designed the latest SIR 9 with their [R]evolution trail geometry, which makes the bike longer in the top tube and shorter in the chainstays. This redesign gives the SIR 9 a lively personality that's quick to turn through tight switchbacks and sweeping berms, as well as making it roomier in the cockpit, so you're well-balanced and comfortable across long distances. The longer wheelbase tracks confidently when you open it up at higher speeds for added composure without it ever feeling twitchy or unnerving when pushed to the limit. Paired with a recommended 120-millimeter fork, you'll find the SIR 9 moves from a rather XC-focused head tube angle of 70 degrees (for the previous model) to a more trail-worthy 68 degrees. This gives you added confidence to attack fast descents and technical trail sections previously on the edge of the old bike's comfort zone. And though it's slacker than before, the SIR 9 still pedals and climbs with gusto, thanks in part to its steeper 74-degree seat tube angle, which places you in an optimal pedaling position. Delving into the frame construction, you'll love the smooth, supple feel of SIR 9's Reynolds 853 steel, especially whe...
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