Trek Session 8 DH 27.5

Name: Trek Session 8 DH 27.5
Brand: Trek

2017 MountainDownhill

Last known price: $3,999

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%
Weight: 17.42 kg 38.4 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

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

Components

17 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

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

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 Reported by the manufacturer

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	426	426	456	456
Head tube lengthmm	115	115	115	115
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	804	790	784	767
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
Bicycle weight: 17.42 kg

38.4 lb
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

4 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: 2017
Sample: 40 bicycles with this information
Coverage: 85.1% of the class

Rear travel

210 mm

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2017
Sample: 38 bicycles with this information
Coverage: 80.8% of the class

Lowest gear

39.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2017
Sample: 39 bicycles with this information
Coverage: 82.9% of the class

Highest gear

90.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2017
Sample: 39 bicycles with this information
Coverage: 82.9% 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
Class reference (p10–p90): 33.4–95.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Downhill Model year: 2017
Lowest gear: 39 bicycles with this information, 82.9% of the class
Highest gear: 39 bicycles with this information, 82.9% of the class

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 2017 builds
Specification	This bicycle Trek Session 8 DH 27.5	Trek Session 88 DH 27.5	Trek Session 9.9	Trek Session 9.9 DH 27.5 Race Shop Limited
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	17.42 kg	17.19 kg	15.58 kg	15.88 kg
Weight limit	136 kg	136 kg	Not informed	136 kg
Suspension
Front travel	200 mm	200 mm	203 mm	203 mm
Drivetrain
Rear sprockets	7	7	10	10
Other specifications
Fork spring	Coil	Coil	Air	Air
Rear shock spring	Not informed	Coil	Coil	Coil

Changes since 2016
Specification	2016 Trek Session 8 DH 27.5	This bicycle Trek Session 8 DH 27.5
Frame
Bicycle weight	Not informed	17.42 kg
Weight limit	Not informed	136 kg
Suspension
Front travel	210 mm	200 mm
Drivetrain
Rear sprockets	10	7
Largest sprocket	26	25
Lowest gear	38.1 in	39.6 in
Other specifications
Fork spring	Not informed	Coil