Trek Session 9.9 29 2019


Session 9.9 is the pinnacle of downhill mountain bike performance. It’s built for one reason: going as fast as freakin’ possible down hills. It pairs proven Shimano Saint parts with our premium OCLV Mountain Carbon frame and FOX Factory suspension with super-fast 29″ wheels. This is the same DH bike the pros ride, and the bike of choice for World Champion Gee Atherton.



  • Frameset

    OCLV Mountain Carbon main frame and stays, ABP, magnesium EVO Link, tapered head tube, Mino Link, integrated frame protection, Control Freak internal routing, Carbon Armor, ISCG mount, 190 mm travel
    Front suspension
    Fox Factory 40 FIT RC2, air spring, Kashima Coat, hi/lo speed compression, Boost 110×20 thru axle, 190 mm travel
    Rear suspension
    Fox Factory Float X2, high/low speed rebound adjust, high/low speed compression adjust, tuned by Trek Suspension Lab, 225×70 mm
  • Wheels

    Bontrager Line DH 30, Tubeless Ready, Boost 110×20 front, 157×12 rear w/7 speed DH freehub
    Bontrager G5 Team Issue, wire bead, 29×2.50˝
  • Drivetrain

    Shimano Saint, 10 speed
    Rear derailleur
    Shimano Saint M820, Shadow Plus
    Shimano Saint M825, 36T w/MRP G4 carbon chainguide
    Bottom bracket
    Shimano SM-BB80, 83 mm
    Shimano CS-5700, 11-25, 10-speed
    KMC X10
    Wellgo MG-1, magnesium body, Cro-Mo axle, replaceable pins
  • Components

    Bontrager Arvada, austenite rails
    Bontrager Rhythm Elite, 31.6 mm, 0 mm offset
    Bontrager Line Pro, OCLV Carbon, 35 mm, 15 mm rise, 820 mm width
    Bontrager XR Trail Elite, alloy lock-on
    Bontrager Line Pro Direct Mount, 35 mm clamp, 50 mm length
    Head set
    FSA Orbit, sealed cartridge bearing, 1-1/8″ top, 1.5″ bottom (includes geometry-adjust angled cups)
    Brake set
    Shimano Saint M820 hydraulic disc
  • Weight

    M – 15.65 kg / 34.5 lbs (with tubes)
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production


Additional information

Weight 15.65 kg


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