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NinerAIR 9
RDO 2-Star SX Eagle Mountain Bike


Item # NNR99AG

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Item # NNR99AG

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

Destined for crushing miles of rolling singletrack and toeing the line on race day, the Niner Air 9 RDO delivers blistering acceleration and nimble handling for ripping across forest networks and blowing the doors off the competition. Winning doesn't have to cost a fortune though thanks to the SX Eagle drivetrain and 100mm FOX fork that gives you equal performance as higher-end builds while leaving enough cash in your pocket for race entry fees or road trips to epic riding destinations.

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, reducing the amount of material required and eliminating excess resin build-up. The result is a claimed weight loss of 10% over previous generations of the Air 9, an impressive feat for a bike that was already light and peppy to begin with.

  • Blistering rocketship for XC racing and riding
  • Modern XC racing geometry with improved handling
  • RDO carbon frame is exceptionally light and stiff
  • 12 x 148mm Boost axle spacing for rear-end stiffness
  • 100mm FOX fork dampens vibration when trails get rough
  • 27.2mm seatpost for greater compliance at the back of the bike
  • SRAM SX Eagle 12-speed has a gear for every pitch
  • Clears up to 2.3in tires for added traction, bump compliance

Tech Specs
Frame Materialcarbon
ForkFOX 32 Float Rhythm GRIP EVOL
Front Travel100mm
HeadsetNiner Integrated SHIS IS42/IS52
ShiftersSRAM SX Eagle
Rear DerailleurSRAM SX Eagle
CranksetSRAM X1 1K Eagle DUB
Chainring Sizes32t
Crank Arm Length[small] 170mm, [medium, large, x-large] 175mm
Bottom BracketSRAM DUB
CassetteSRAM PG-1230
Cassette Range11 - 50t
ChainSRAM SX Eagle
BrakesetSRAM Level
Brake Typehydraulic disc
Rotors[front] 180mm SRAM G2CS, [rear] 160mm SRAM G2CS
Rotor Size[front] 180mm, [rear] 160mm
HandlebarNiner Flat Top Alloy
Handlebar Width780mm
GripsNiner Grrrips, nylon soft compound
StemNiner Alloy
Stem Length[small, medium] 80mm, [large, x-large] 90mm
SaddleNiner Custom, Chro-mo rails
SeatpostNiner Alloy
WheelsetNiner Alloy, 25mm
Front Axle15 x 110mm Boost
Rear Axle12 x 148mm Boost
Tire Clearance29 x 2.3in
Tires[front] Schwalbe Racing Ray Evo Super Terrain TLE Addix Speedgrip, [rear] Schwable Racing Ralph Evo Super Terrain TLE Addix Speedgrip
Tire Size29 x 2.35in
Pedalsnot included
Extraschainstay protector
Manufacturer Warranty[frame] lifetime

120mm Travel Fork

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Actual Weight


Claimed Weight

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[medium] 24.4lb

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

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