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NinerJET 9
RDO 2-Star SX Eagle Mountain Bike


Item # NNR99AJ

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Item # NNR99AJ

Why We Like The JET 9 RDO 2-Star SX Eagle Mountain Bike

Some of our favorite bikes are the ones that can handle XC duties in a pinch while remaining a fun and practical everyday trail bike. That's why we love the Niner Jet 9 RDO. There's nothing better than a fast, spritely bike that rockets up the climbs, yet still has the confidence and stability to get those rowdy trails under your belt, and hit some jumps and drops along the way. Tapping into agility from its XC race roots and blending it with the ever-growing demand for longer and lower geometry for more fun up and down the mountain, the JET 9 is everything a core trail rider needs to get the most out of each and every ride.

As for the frame itself, Niner's Race Day Optimized (RDO) construction process yields a strong and lightweight carbon frame. Niner's proprietary compaction method presses out any excess resin and compacts the carbon down to a uniform wall thickness. This gives Niner precise control over where the material is and where it isn't, letting the engineers actually engineer the frame by reducing weight where it's not needed while ensuring stiffness and durability at key areas of power transfer and abuse.

Niner's signature CVA suspension finds it's way to the Jet 9 RDO. CVA is designed specifically around 29-inch wheels to keep the big-wheel platform balanced between taut under power and supple while rallying over rocks and roots. Its low compression ratio means there's less need for suspension pre-load, so the mechanism can float more freely and react more readily to the terrain without being loose or sloppy. CVA's lower linkage placement beneath the bottom bracket isolates pedal input from suspension action to prevent the system from bobbing or back-kicking, resulting in a smooth but efficient bike that's responsive to both your power and the trail's trickery.

The frame's finishing details are everything you'd expect from the obsessive developers at Niner, and our favorite is the inclusion of a BSA threaded bottom bracket. PressFit shells may be lighter and more convenient, but the exact tolerances of a CNC-machined thread are virtually unsurpassable by today's composite technology. The threading means bearing cups install perfectly, reducing wear over time and reducing the creaks, groans, and pops that so often accompany PressFit models. Vulnerable bits are girded with titanium protection plates. The frame also includes integrated battery storage in case you get the urge for electro shifting, and the revised axle spacing and geometry dimensions accommodate 29er tires up to 2.5 inches and 27.5+ tires up to 3 inches in width.

  • Niner's iconic trail bike blends XC speed with trail capability
  • 120mm of CVA travel is efficient, yet supple over rough trails
  • Balanced trail geometry powers up climbs and rips down descents
  • Boost 148mm rear spacing clears 29 x 2.5 and 27.5 x 3in tires
  • Internal tunnels for easier cable routing and maintenance
  • SRAM GX Eagle 1x12 drivetrain offers a massive range of gears
  • Stan's Arch MK3 Wheels with 26mm width for optimal tire support

Tech Specs
Frame MaterialRDO carbon fiber
Rear ShockFox Float DPS Performance EVOL
Rear Travel120mm
ForkFox 34 Float Rhythm GRIP EVOL, 44mm offset
Front Travel130mm
HeadsetNiner Internal ZS
ShiftersSRAM SX Eagle, 12-speed
Rear DerailleurSRAM SX Eagle, 12-speed
CranksetSRAM X1 1K Eagle DUB
Chainring Sizes32t
Bottom BracketSRAM DUB
Bottom Bracket TypeBSA threaded
CassetteSRAM PG-1210, 12-speed
Cassette Range11 - 50t
ChainSRAM SX Eagle, 12-speed
BrakesetSRAM Level
Brake Typehydraulic disc
Rotors180mm G2CS
HandlebarRace Face Aeffect R 35
Handlebar Rise20mm
Handlebar Width780mm
GripsNiner Grrrips lock-on
StemRace Face Aeffect R
Stem Length40mm
SaddleNiner Custom TR, Cr-Mo rails
SeatpostKS Lev SI, [x-small, small] 100mm, [medium - x-large] 150mm
WheelsetNiner Alloy, 30mm
Front Axle15 x 110mm Boost
Rear Axle12 x 148mm Boost
TiresSchwalbe Nobby Nic Evo Super Trail TLE Addix SpeedGrip
Tire Size[front] 29 x 2.6in, [rear] 29 x 2.35in
Pedalsnot included
Extrasdowntube protector, chainstay protector
Recommended Usecross-country, trail
Manufacturer Warranty[frame] lifetime

130mm Travel Fork

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140mm Travel Fork

For screen reader users: each row header contains a button that can be toggled to provide additional information.

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Claimed Weight

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Actual weights are measured in-house by the Competitive Cyclist team.

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