Trek Session 8 27.5 Bike
Session 8 is the DH mountain bike with a park-focused geometry that shines on big hits at the bike park. It’s built with a burly aluminum frame, 200mm/210mm front and rear suspension, and a SRAM GX DH parts group chosen to stand up to the roughest lines you can find.
Specifications
*spec applies to all sizes unless otherwise noted
Frameset
| Frame | Alpha Platinum Aluminum, tapered head tube, internal control routing, integrated frame protection, downtube guard, ISCG 05 mount, magnesium rocker link, Mino Link, ABP, 157x12mm thru axle, 210mm travel |
|---|---|
| Fork | RockShox Boxxer Select, DebonAir spring, Charger RC damper, 46mm offset, 20x110mm Boost thru axle, 200mm travel |
| Max compatible fork travel | 200mm |
Wheels
| Wheel front | Bontrager Line DH 30, Tubeless Ready, 6-bolt, 110x20mm Boost thru axle |
|---|---|
| Wheel rear | Bontrager Line DH 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano 7spd freehub 157x12mm thru axle |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| Tire | Bontrager G4 Team Issue, Inner Strength sidewalls, wire bead, 60 tpi, 27.5×2.40” |
| Max tire size | 27.5×2.40″ |
Drivetrain
| Shifter | SRAM GX DH, 7 speed |
|---|---|
| Rear derailleur | SRAM GX DH, medium cage |
| Crank | Truvativ Descendant DH, DUB 83, 34T steel ring, 165mm length |
| Bottom bracket | SRAM DUB, 83mm, BSA threaded |
| Cassette | SRAM PG-720, 11-25, 7 speed |
| Chain | SRAM PC-1110, 11 speed |
| Pedal | Wellgo BO-87B, alloy body, Cro-Mo axle, replaceable pins |
| Max chainring size | 36T |
Components
| Saddle | Bontrager Arvada, hollow chromoly rails, 138mm width |
|---|---|
| Seatpost | Bontrager Rhythm Elite, 31.6mm, 0mm offset, 330mm length |
| Handlebar | Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width |
| Grips | Bontrager XR Trail Elite, alloy lock-on |
| Stem | Bontrager Line Pro, 35mm, Direct Mount, 50mm length |
| Headset | FSA Orbit, sealed cartridge bearing, 1-1/8” top, 1.5” bottom |
| Brake | SRAM Guide R 4-piston hydraulic disc, 200mm front rotor, 180mm rear rotor |
| *Brake rotor | Size: S, M, L, XL SRAM CenterLine, 6-bolt, round edge, 180mm |
| Size: S, M, L, XL SRAM CenterLine, 6-bolt, round edge, 200mm |
Weight
| Weight | M – 16.27 kg / 35.87 lbs (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
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 retailer.
Rider Height
Inseam
S
153.0 – 166.5 cm
5’0.2″ – 5’5.6″
72.0 – 79.0 cm
28.3″ – 31.1″
M
161.0 – 175.0 cm
5’3.4″ – 5’8.9″
76.0 – 82.0 cm
29.9″ – 32.3″
L
174.0 – 188.0 cm
5’8.5″ – 6’2.0″
82.0 – 88.0 cm
32.3″ – 34.6″
XL
186.0 – 196.0 cm
6’1.2″ – 6’5.2″
87.0 – 92.0 cm
34.3″ – 36.2″
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 | High | 27.5″ | 42.6 | 57.6° | 11.5 | 64.2° | 57.0 | 36.4 | 0.9 | 44.3 | 5.2 | 11.4 | 118.5 | 81.0 | 38.9 | 60.3 |
| M | High | 27.5″ | 42.6 | 57.6° | 11.5 | 64.2° | 59.0 | 36.4 | 0.9 | 44.3 | 5.2 | 11.4 | 120.5 | 79.3 | 40.8 | 60.3 |
| L | High | 27.5″ | 45.6 | 57.6° | 11.5 | 64.2° | 61.4 | 36.4 | 0.9 | 44.3 | 5.2 | 11.4 | 122.9 | 79.0 | 43.2 | 60.3 |
| XL | High | 27.5″ | 45.6 | 57.6° | 11.5 | 64.2° | 63.8 | 36.4 | 0.9 | 44.3 | 5.2 | 11.4 | 125.3 | 77.5 | 45.6 | 60.3 |
| 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 | 79.0 | 40.2 | 60.7 |
| L | Low | 27.5″ | 45.6 | 57.0° | 11.5 | 63.6° | 61.8 | 35.6 | -0.1 | 44.5 | 5.2 | 11.8 | 122.7 | 78.4 | 42.6 | 60.7 |
| XL | Low | 27.5″ | 45.6 | 57.0° | 11.5 | 63.6° | 64.2 | 35.6 | -0.1 | 44.5 | 5.2 | 11.8 | 125.1 | 76.7 | 45.0 | 60.7 |
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