Trek Session 8 27.5

Name: Trek Session 8 27.5
Brand: Trek

2018 MountainDownhill

Last known price: $3,799

Prices shown first for United States
Travel: 200 / 210 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 7 36t / 11–25t
Gear range: 227%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

SM Low
MD Low
LG Low
XL Low

The manufacturer did not publish rider heights for these sizes.

Components

16 of 19 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

Alpha Platinum Aluminum, ABP, Full Floater, EVO Link, E2 tapered head tube, Mino Link, integrated frame protection, internal control routing, MicroTruss, down tube guard, ISCG Mount, 210mm travel Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

Sealed cartridge Not identified
Cassette
- SRAM PG-720 7 speeds
PG-720
Chain
- SRAM PC-1110 11 speeds
PC-1110
Crankset
- Truvativ DESCENDANT 36t
Rear derailleur
- SRAM GX
Shifters
- SRAM GX DH X-ACTUATION Trigger 7 speeds

Brakes

1 part

Brakes
- SRAM Guide R

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips
- Bontrager
Handlebar
- Bontrager
Headset
- FSA ORBIT IS 138
Pedals
- Wellgo
BO-87B
Saddle
- Bontrager
Seatpost
- Bontrager
Stem

Direct Mount, 31.8mm Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size MD Low

Table

Reach 402mm

Stack 607mm

Wheelbase 1203mm

Head angle 63.6°

Seat angle 57.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	382	402	426	450
Stackmm	607	607	607	607
Top tube lengthmm	574	594	618	642
Seat tube lengthmm	412	445	445	483
Head tube lengthmm	150	150	150	150
Head tube angle	63.6°	63.6°	63.6°	63.6°
Seat tube angle	57°	57°	57°	57°
Chainstay lengthmm	445	445	445	445
Wheelbasemm	1183	1203	1227	1251
Front centermm	738	758	782	806
Bottom bracket dropmm	-1	-1	-1	-1
Bottom bracket heightmm	356	356	356	356
Standover heightmm	755	748	744	749
Fork rakemm	49	49	49	49
Trailmm	118	118	118	118
Stack/reach ratio	1.59	1.51	1.43	1.35

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Full suspension
Front travel: 200 mm
Rear travel: 210 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 7
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

Fork spring: Coil
Tire width: 2.35″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

200 mm

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2018
Sample: 93 bicycles with this information
Coverage: 92.0% of the class

Rear travel

210 mm

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2018
Sample: 96 bicycles with this information
Coverage: 95.0% of the class

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 2018 builds

Differences across 2018 builds
Specification	This bicycle Trek Session 8 27.5	Trek Session 9.9	Trek Session 9.9 DH 27.5 Race Shop Limited
Frame
Frame material	Aluminum	Carbon	Carbon
Bicycle weight	Not informed	15.58 kg	15.38 kg
Suspension
Front travel	200 mm	203 mm	203 mm
Drivetrain
Rear sprockets	7	10	10
Other specifications
Fork spring	Coil	Air	Air
Rear shock spring	Not informed	Coil	Not informed