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It's right for you if...
You seek out the steepest descents, the fastest lines, and the biggest jumps. You're looking for a fast, agile, light DH ride with a high-quality shock and the best frame tech for ridiculous speed in downhill races.
The tech you get
A strong and light full OCLV Mountain Carbon frame, 190mm of travel with an adjustable FOX Factory Float X2 shock tuned by Trek Suspension Lab, Carbon Armor frame protection, and adjustable fixed-angle FSA Orbit headset, and exclusive trail tech like ABP and Mino Link. Built for 27.5˝ wheels.
The final word
This light and nimble bike is built for speed and agility on the biggest, roughest downhill runs.
favorite_borderWhy you'll love it
- Session has the heart of a monster truck: it rolls over everything, gives you the confidence to take on rougher trails, and saves you when you don't take the right line
- OCLV Mountain Carbon is light and strong, even on the wildest runs
- Race or get rowdy? This bike does both
- 27.5 wheels are great for flicking the bike around through the most technical trail
- Mino Link and fixed-angle headset cups let you adjust your geometry for the exact handling you want
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Features
Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.
Trek's mountain-specific carbon fiber is tougher carbon, with unique materials and layup procedures, Trek's advanced engineering, and a higher standard of testing.
Learn more
Looks like a World Championship
Trek Factory Racing's Reece Wilson charged his way into the rainbow jersey aboard Session this year, taking all the right risks on a slick course and carving his name in Downhill's history books with a truly gutsy run.
Watch the winning run
Mino Link adjustable geometry
Fine tune head tube angle by 1/2° and BB height by up to 10mm with the simple turn of a nut. Just flip the link to choose between slack or slacker geometry, without negatively affecting suspension performance. A Trek exclusive.
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Carbon Armor
Sometimes you need a little extra protection, so we developed our light, tough external Carbon Armor polymer shield. It provides reassurance when you know your down tube is bound to take some abuse.
Suspension Calculator
This suspension calculator will help you optimize your suspension settings for your riding weight. Simply follow the steps to find your best set up.
Learn more
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | OCLV Mountain Carbon main frame & stays, tapered head tube, integrated frame protection, Control Freak internal routing, magnesium rocker link, Mino Link, ISCG mount, ABP, 12x157mm thru axle, 190mm travel |
|---|---|
| Shock | Fox Factory Float X2, high/low speed rebound adjust, high/low speed compression adjust, tuned by Trek Suspension Lab, 225x75mm |
| Max compatible fork travel | 200mm |
| Max tire size | 27.5x2.40" |
|---|
| Max chainring size | 36T |
|---|
| Weight | M - 3.27 kg / 7.2 lbs |
|---|---|
| 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
157.0 - 167.0 cm
5'1.8" - 5'5.7"
74.0 - 78.0 cm
29.1" - 30.7"
M
168.0 - 177.0 cm
5'6.1" - 5'9.7"
79.0 - 83.0 cm
31.1" - 32.7"
L
178.0 - 187.0 cm
5'10.1" - 6'1.6"
84.0 - 88.0 cm
33.1" - 34.6"
XL
188.0 - 196.0 cm
6'2.0" - 6'5.2"
88.0 - 92.0 cm
34.6" - 36.2"
All measurements provided in cm unless otherwise noted.
| Frame size number | Frame size letter | A — Seat tube | B — Seat tube angle | Effective 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.5 | S | 39.4 | 67.9° | 72.4° | 9.0 | 67.9° | 59.0 | 31.7 | 6.8 | 42.0 | 5.1 | 10.1 | 108.9 | 76.2 | 38.9 | 63.7 |
| 17.5 | M | 41.9 | 67.8° | 72.3° | 9.0 | 67.8° | 61.8 | 31.8 | 6.7 | 42.0 | 5.1 | 10.2 | 111.7 | 76.0 | 41.5 | 63.5 |
| 19.5 | L | 47.0 | 67.8° | 72.3° | 10.0 | 67.8° | 65.0 | 31.7 | 6.8 | 42.0 | 5.1 | 10.2 | 114.9 | 79.3 | 44.4 | 64.5 |
| 21.5 | XL | 52.1 | 67.8° | 72.3° | 11.0 | 67.8° | 67.2 | 31.7 | 6.8 | 42.0 | 5.1 | 10.2 | 117.2 | 79.5 | 46.3 | 65.4 |