Select a Size:
Find your size
Note: Actual inseam is not the same as pant inseam.How to measure
We recommend a size in this bike.
Our size calculator is a starting point for finding the right size for you. To get personal advice talk to one of our fit experts at 1.888.276.7130 or chat now
Select a Color:Select options
A jetpack to take you from XC to trail.
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 worried about the loss of an XC bike, the RKT has stepped in to take the race-rocket place of the Jet as the new go-to for an XC race machine.
Climbing is efficient with Niner's Constant Varying Arc suspension, without compromising that smooth and bottomless feel we covet. CVA, along with FOX's Float DPS Performance Evol rear shock, manages to throw 4.7-inches of boulder-hungry travel into the rear end for gobbling up rock gardens and rooty tree lines. CVA works by pulling the bottom link down as you pedal, avoiding pedal bob, while the top linkage is free to move and respond to rocks and bumps on the way up.
Complimenting CVA and the Fox Float DPS rear shock is a Fox Float 34 Rhythm fork, equipped with 130mm of travel for soaking up rocks and blows on the trail. The 34mm stanchions offer supple support for tracking your line down the mountain with confidence. This particular build is designed around the 29er wheel, making a 130mm fork appropriate for its geometry, but Niner recommends swapping to a 140mm fork, along with a 15mm lower headset cup to compensate for the subtle changes in fit and geometry, along with bottom bracket height that goes along with running a slightly smaller wheel. The 2-stay GX build sees SRAM's GX Eagle drivetrain, which offers a massive 10-50-tooth 12-speed cassette. With the plusses of Eagle, you'll find a gear for any climb or descent, with a huge bailout cog for those super steep and punchy moments when a 42 or 46-tooth won't do. SRAM's GX Eagle has the technology of their XX1 and X01, but with a bit more weight and huge price savings, making eagle attainable to those looking to keep a tighter budget.
The lightweight RDO carbon that makes up the Jet 9 RDO is resilient, and designed to create a singletrack slayer. Niner's method for completing a carbon layup manages to squeeze out excess resin during the molding process, which reduces pooling, voids, and maintains precision when it comes to thickness and construction. The carbon fiber layup has ports for internal cable routing, so you can end with a clean finish. The frame is designed to capture long, low geometry that's popular in today's trail bikes. The longer reach allows you to run a shorter stem, which enables quick handling, while keeping your weight back, so long descents are a breeze. Shorter chainstays come in at just 434mm, tucking the rear wheel up underneath you, so you'll find better climbing traction, and agility for flicking the bike through tight switchbacks and trees. For the perfect balance between slack and steep, the head angle falls at 67.5-degrees, perfect for precise steering with both slow-speed encounters and high-speed stability.
- Niner's Jet gets a trail-hungry makeover
- 120mm of CVA suspension designed for big wheels lines
- Updated geometry powers up climbs and bombs down descents
- SSRAM GX Eagle adds the huge gear range without the price of XX1
- FOX suspension is plush, easy to setup and maintain
- Pulls double duty with compatibility for 27.5+ and 29in wheels
- Item #NNR006V