Bike Comparison
    MSRP
    $6,800$579
    Where to Buy
    $1

    At

    $579

    At Trek

    Category
    CrosscountryCrosscountry
    Weight
    19.8 lbs32.2 lbs
    7.3
    2.4
    CarbonAluminum
    Fork
    Fox Factory Float 32Suntour XCE
    Wheels
    Aluminum
    29″27.5″ / 29″
    Brakes
    Hydraulic DiscMechanical Disc
    Groupset
    X01 Eagle, X1Tourney, Altus
    Drivetrain
    1 × 122 × 7
    Suspension
    HardtailHardtail
    Front Travel
    100mm100mm
    Brand Site

    ninerbikes.com

    trekbikes.com

    Summary
    The Niner AIR 9 RDO - 5-Star X01 Eagle - 29 is a 29″ carbon frame hardtail crosscountry bike with ultra high-end components.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Terrain
    easyextreme
    Handling
    nimblestable
    2024 Marlin 4 Gen 2
    Other Crosscountry bikes
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    28 mph

    2019 AIR 9 RDO - 5-Star X01 Eagle - 29

    22 mph

    2024 Marlin 4 Gen 2

    Highest gear

    (descending)

    Spec Level

    Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

    Geometry
    Specs
    Frame

    Niner RDO carbon fiber, internal cable routing, PF30 BB, single-speed compatible.

    BB StandardPF30, 73mm, Press Fit

    Tire Clearance2.4"

    Size: XS, S, Alpha Silver Aluminum, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR; Size: M, ML, L, XL, Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR

    BB StandardPF30, 73mm, Press Fit

    Tire Clearance2.4"

    Fork

    FOX 32 SC FLOAT FACTORY FIT4, W/ REMOTE L/O, KASHIMA COAT, 100MM, 110X15MM, 51MM OFFSET

    Travel100mm

    Spring TypeCoil

    Size: XS, SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel; Size: S, SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel; Size: M, ML, L, XL, SR Suntour XCE 28, coil spring, preload, 46mm offset for 29'' wheel, 100mm QR, 100mm travel

    Travel100mm

    Spring TypeCoil

    Shock

    N/A

    Bottom Bracket

    73mm PF30 BB Shell (Adapters Required For BSA Type BBs)

    VP BC73, 73mm, threaded cartridge

    Headset

    NINER INTEGRATED SHIS DESCRIPTION IS42/28.6|IS52/40

    Semi-integrated, 1-1/8''

    Stem

    NINER RDO STEM, NINER GRAPHIC

    Size: XS, S, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: M, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: ML, L, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: XL, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 80mm length

    Handlebar

    NINER FLAT TOP RDO, 780MM, NINER GRAPHIC

    Size: XS, S, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: M, ML, L, XL, Bontrager alloy, 31.8mm, 15mm rise, 750mm width

    Saddle

    NINER CUSTOM WITH CRN-TI RAILS, EMBOSSED NINER GRAPHIC

    Bontrager Verse Short, stainless steel rails

    Seatpost

    NINER RDO SEAT POST, 370MM, NINER GRAPHIC

    Size: XS, S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: ML, L, XL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length

    Pedals

    VP-536 nylon platform

    Grips

    NINER GRRRIPS L/O

    Bontrager XR Endurance Comp, lock-on

    Groupset
    Rear Derailleur

    SRAM X01 EAGLE 12SP

    Shimano Tourney TY300

    Front Derailleur

    N/A

    Shimano Altus M315, 34.9mm clamp, top swing, dual pull

    Crank

    SRAM X1 EAGLE CARBON DUB 32T CNC RING

    Size: XS, S, M, ProWheel TM-CY10, 36/22, 170mm length; Size: ML, L, XL, ProWheel TM-CY10, 36/22, 175mm length

    Shifters

    SRAM X01 EAGLE 12SP

    Size: XS, S, M, ML, L, XL, Shimano EF500, 8 speed; Size: XS, S, M, ML, L, XL, Shimano EF500, 7 speed

    Cassette

    SRAM EAGLE XG 1295, 10-50T

    Shimano TZ500, 14-34, 7 speed

    Chain

    SRAM X01 EAGLE 12SP

    KMC Z7, 7 speed

    Brakes

    SRAM GUIDE RSC

    Size: XS, S, M, ML, L, XL, Tektro MD-M280 mechanical disc; Size: XS, S, M, ML, L, XL, Tektro MD-M281 mechanical disc

    Brake Levers

    SRAM GUIDE RSC

    Wheels
    Rims

    Front: STANS NOTUBES ARCH CB7, NEO ULTIMATE HUB 110X15MM FRONT, Rear: STANS NOTUBES ARCH CB7, NEO ULTIMATE HUB 148X12MM REAR

    Tires

    Front: MAXXIS REKON 3C/EXO/TR 29x2.4 WT FRONT, Rear: MAXXIS REKON RACE 2C/EXO/TR 29x2.25 REAR

    Disc Rotors

    180/160 SRAM CENTERLINE ROTORS

    Tektro, 6-bolt, 160mm

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