Trek Session 9.9 DH 27.5

2015 MountainDownhill

Travel: 210 / 210 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 10 36t / 11–25t
Gear range: 227%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

13 of 14 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

OCLV Mountain Carbon w/InTension main frame, OCLV stays, Carbon Armor, ABP Convert DH, Full Floater, E2 tapered head tube, integrated frame protection, internal control routing, HexMC carbon EVO Link, Mino Link, MicroTruss, 210mm travel Not identified

Drivetrain

4 parts

Brakes

1 part

Brakes
- Shimano Saint

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

4 sizes

Enter your height to highlight matching ranges.

Size Reported by the manufacturer

Geometry not published

The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon

Suspension

Suspension configuration: Full suspension
Front travel: 210 mm
Rear travel: 210 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 25
Lowest gear: 39.6 in
Highest gear: 90.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.35″
Wheel material: Aluminum
Wheel size: 27.5″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 15.2 km/h
Highest gear: 34.5 km/h

Total gear range 227%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 39.6–90.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2015 builds

Differences across 2015 builds
Specification	This bicycle Trek Session 9.9 DH 27.5	Trek Session 88 DH 27.5	Trek Session 8 Park 26	Trek Session 9.8 Park 26
Frame
Frame material	Carbon	Aluminum	Aluminum	Carbon
Suspension
Front travel	210 mm	210 mm	190 mm	190 mm
Drivetrain
Largest sprocket	25	26	26	26
Lowest gear	39.6 in	38.1 in	36.0 in	36.0 in
Highest gear	90.0 in	90.0 in	85.1 in	85.1 in
Other specifications
Rear travel	210 mm	210 mm	190 mm	190 mm
Wheel size	27.5″	27.5″	26″	26″