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    AIR 9 Mountain Bike

    RLT e9 RDO

    Gravel road chameleon

    Niner Bikes

    Blending versatility, utility, and durability

    A shapeshifting, multipurpose e-gravel bike for any adventure

    We’re calling it our first e-gravel bike, but it’s more like a pedal-powered SUV. Or an overland expedition vehicle. Or an urban ninja transit device. Our design details make this new bike equally at home across a range of environments, rolling over a broad swath of surfaces. Bosch powered, cargo capable, front suspension-ready, and flat-bar friendly, there’s almost no transportation task this chameleon can’t handle.

    Bosch Performance for Speed

    The e-version of our vaunted RLT gravel bike goes far and it goes fast. The Bosch Performance Line Speed drive system propels a rider to 28 miles per hour (Performance Line CX and 25kph in the EU) with a 500wh battery for longer distances. Bosch leads the category with reliable motors that deliver smooth, lag-free pedal assist, backed by an unparalleled global service network.

    What’s not so obvious are the details, starting with our RDO carbon construction. Our engineers wanted the battery to be integrated and yet easily externally removable for the utmost flexibility when recharging. However, this design presents engineering challenges that we solved in elegant fashion.

    Designed for Durability and Versatility

    Using FEA modeling and extensive testing, lead engineer George Parry built a robust carbon backbone structure to withstand the roughest roads imaginable. In fact, the RLT e9 RDO passes ISO mountain bike test standards. Bonded to a 1-piece alloy motor mount, this machine is ready to go the distance for years to come.

    Subtle design features add incredible versatility. Post-mount disc brake fitment makes it easy to change to a flat handlebar with mountain bike brakes. Likewise, our intentional inclusion of Boost hub and crankset spacing allows the rider interchangeability with mountain bike drivetrain parts. And the all-new RLT e9 RDO carbon fork is the same length as a FOX AX suspension fork. There’s even routing for a dropper seatpost.

    Ride Locally or Around the Globe

    For a dose of rugged utility, Niner’s custom, integrated racks are available to carry supplies for a trip to the office or a ride around the world. Clearance for comfortable 50c tires and fitment for fenders round out this chameleon-like gravel bike.

    If you can dream it, the RLT e9 RDO can do it. Gravel roads around the globe beckon this bike, as do social trails through town, bike paths, and even urban alleyways. Adventure waits for you, but don’t keep it waiting

    Close up on the AIR 9 Mountain Bike

    RDO carbon fiber

    Niner’s highest-grade Race Day Optimized (RDO) carbon fiber frame and fork, tested to ISO mountain bike standards. 
    Close up on the AIR 9 Mountain Bike

    Bosch motor

    Bosch Performance Line Speed drive system top speed of 28mph (In EU, Performance Line CX motor, top speed 25kph). Read More
    Close up on the AIR 9 Mountain Bike

    Power Tube 500 battery

    500wh integrated, externally removable downtube battery offers easy access and robust range of 50km (avg).
    Close up on the frame of the AIR 9 Mountain Bike

    Interchangeable wheel size

    Niner gravel bikes are designed to fit both 700c and 650b wheels, for ultimate versatility and adaptability to suit any adventure.
    Close up on the frame of the AIR 9 Mountain Bike

    MTB compatibility

    Boost hub spacing and post mount brake fitment allow MTB flat bar component interchangeability.
    Close up on the frame of the AIR 9 Mountain Bike

    Tire clearance

    Clearance for 700x50c or 650bx2.0 tires.
    Close up on the frame of the AIR 9 Mountain Bike

    Integrated racks

    Custom Niner integrated front and rear racks available.

    Specifications

    A blend of performance, versatility, and value are distinctive in the RLT e9 RDO parts kit. Gravel-friendly Shimano GRX drivetrain and brakes are fitted for miles of reliable rides.

    • Shimano GRX flat mount brake calipers with custom Niner adapters for post mount frame compatibility
    • Shimano GRX drivetrain is Boost spaced for MTB parts compatibility
    Available frame sizes50, 53, 56, 59Available colorsElectric Moss Green
    MOTORBOSCH GEN4 PERFORMANCE LINE CX 28MPHFRAMENINER RDO CARBON
    DISPLAYBOSCH PURIONFORKNINER RDO CARBON
    SHOCKN/ABATTERYBOSCH POWERTUBE 500WH
    FRONT WHEELSTANS NOTUBES ARCH D, FORMULA CL-811 HUB 110X15MM FRONTTUBES/SEALANTTUBES
    FRONT TIRESCHWALBE G-ONE SPEED PERFORMANCE, 700X50CREAR WHEELSTANS NOTUBES ARCH D, FORMULA ECT-148S HUB 148X12MM REAR
    BRAKESSHIMANO GRX 400REAR TIRESCHWALBE G-ONE SPEED PERFORMANCE, 700X50C
    BRAKE ROTORSSHIMANO RT-EM810 180MM CENERLOCKBRAKE LEVERSSHIMANO GRX 600
    FRONT SHIFTERSHIMANO GRX 600CHAINSHIMANO CN-E8000
    FRONT DERAILLEURN/AREAR SHIFTERSHIMANO GRX 600
    CASSETTESHIMANO SLX M7000 11-42TREAR DERAILLEURSHIMANO GRX 800
    BOTTOM BRACKETN/ACRANKSETPRAXIS BOSCH G4 ISIS 42T (50CM-170MM, 53/56CM-172.5MM, 59CM-175MM)
    SEATPOSTNINER CARBON, 400MM, NINER GRAPHICSADDLENINER CUSTOM WITH CR-MO RAILS, EMBOSSED NINER GRAPHIC
    STEMNINER ALLOY STEM, NINER GRAPHICHANDLEBAREASTON EA50 AX (50CM-420MM, 53CM-440MM, 56/59CM-460MM)
    GRIPSNINER BAR TAPEHEADSETNINER INTEGRATED SHIS DESCRIPTION IS42/286 | IS52/40
    APPROX. WEGHT39.25 LBS / 17.8KG

    A blend of performance, versatility, and value are distinctive in the RLT e9 RDO parts kit. Gravel-friendly Shimano GRX drivetrain and brakes are fitted for miles of reliable rides.

    • Shimano GRX flat mount brake calipers with custom Niner adapters for post mount frame compatibility
    • Shimano GRX drivetrain is Boost spaced for MTB parts compatibility
    Available frame sizes50, 53, 56, 59Available colorsElectric Moss Green
    MOTORBOSCH GEN4 PERFORMANCE LINE CX 25KPHFRAMENINER RDO CARBON
    DISPLAYBOSCH PURIONFORKNINER RDO CARBON
    SHOCKN/ABATTERYBOSCH POWERTUBE 500WH
    FRONT WHEELSTANS NOTUBES ARCH D, FORMULA CL-811 HUB 110X15MM FRONTTUBES/SEALANTTUBES
    FRONT TIRESCHWALBE G-ONE SPEED PERFORMANCE, 700X50CREAR WHEELSTANS NOTUBES ARCH D, FORMULA ECT-148S HUB 148X12MM REAR
    BRAKESSHIMANO GRX 400REAR TIRESCHWALBE G-ONE SPEED PERFORMANCE, 700X50C
    BRAKE ROTORSSHIMANO RT-EM810 180MM CENERLOCKBRAKE LEVERSSHIMANO GRX 600
    FRONT SHIFTERSHIMANO GRX 600CHAINSHIMANO CN-E8000
    FRONT DERAILLEURN/AREAR SHIFTERSHIMANO GRX 600
    CASSETTESHIMANO SLX M7000 11-42TREAR DERAILLEURSHIMANO GRX 600
    BOTTOM BRACKETN/ACRANKSETPRAXIS BOSCH G4 ISIS 42T (50CM-170MM, 53/56CM-172.5MM, 59CM-175MM)
    SEATPOSTNINER CARBON, 400MM, NINER GRAPHICSADDLENINER CUSTOM WITH CR-MO RAILS, EMBOSSED NINER GRAPHIC
    STEMNINER ALLOY STEM, NINER GRAPHICHANDLEBAREASTON EA50 AX (50CM-420MM, 53CM-440MM, 56/59CM-460MM)
    GRIPSNINER BAR TAPEHEADSETNINER INTEGRATED SHIS DESCRIPTION IS42/286 | IS52/40
    APPROX. WEGHT39.25 LBS / 17.8KG

    Niner Bikes reserves the right to change bike assembly specification at any time without notice. While we make every effort to publish accurate build specs, substitutions and/or running changes may be made without warning.

    Tech specs for the AIR 9 mountain bike