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Session 9.9

$4,999.99 $9,999.99 Model 16944
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Going down?

World Cup champion Session is built to win. An all-new OCLV Carbon frame, updated geometry, advanced air shock, and a stiffer chassis make this downhill race bike faster than ever.

Session is the DH bike that excels on downhill's most brutal courses. Take on any terrain with our most advanced suspension and a geometry that can be dialed for every race.

Key features

  • Fast 27.5 wheels get you down the mountain first
  • OCLV Mountain Carbon with Carbon Armor is downhill tough
  • ABP keeps your suspension active while you're on the brakes
  • Mino Link adjustable geometry lets you fine tune your ride

More options



  • Frameset

    OCLV Mountain Carbon w/InTension main frame, OCLV stays, ABP, Full Floater, HexMC carbon EVO Link, E2 tapered head tube, Mino Link, integrated frame protection, internal control routing, MicroTruss, Carbon Armor, ISCG mount, 210mm travel
    Front suspension
    Fox Factory 40 FIT RC2 w/air spring, Kashima Coat, hi/lo speed compression, 20mm thru axle, 203mm travel
    Rear suspension
    Fox Factory DHX 2 SLS, adjustable spring preload, rebound, low-speed compression, (S 400lb; M 450lb; L 450lb; XL 500lb spring), tuned by Trek Suspension Lab, 8.75x2.75"
  • Wheels

    DT Swiss FR1950 Gravity Classic, 20mm front, 157x12 rear
    Bontrager G4 Team Issue, 27.5x2.35"
  • Drivetrain

    Shimano Saint, 10 speed
    Rear derailleur
    Shimano Saint, Shadow Plus
    Shimano Saint, 36T
    Bottom bracket
    Sealed cartridge
    Shimano Ultegra, 11-25, 10 speed
    Shimano XTR
    Wellgo MG-1, magnesium body, Cro-Mo axle, replaceable pins
  • Components

    Bontrager Evoke 3, hollow titanium rails
    Bontrager Rhythm Elite, 2-bolt head, 31.6mm, zero offset
    Bontrager Rhythm Pro, OCLV Carbon, 31.8mm, 15mm rise
    Bontrager Rhythm, dual lock-on
    Bontrager Direct Mount, 31.8mm
    Cane Creek IS-3, E2, alloy cartridge
    Shimano Saint hydraulic disc
  • Weight

    M - 15.58 kg / 34.35 lbs
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
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 off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.


Rider Height

All measurements provided in cm unless otherwise noted.

Frame size letter Geometry position Wheel size A Seat tube B Seat tube angle C Head tube length D Head angle E Effective top tube F Bottom bracket height G Bottom bracket drop H Chainstay length I Offset J Trail K Wheelbase L Standover M Frame reach N Frame stack
S Low 27.5" 42.6 57.0° 11.5 63.6° 57.4 35.6 -0.1 44.5 5.2 11.8 118.3 80.4 38.2 60.7
M Low 27.5" 42.6 57.0° 11.5 63.6° 59.4 35.6 -0.1 44.5 5.2 11.8 120.3 79 40.2 60.7

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