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It's right for you if...
You want a race-ready downhill frame with geometry designed to break records. You appreciate the individualization that the frameset-only package offers, so that you can choose every part to your liking.
The tech you get
Session 27.5 Carbon Frameset is spec'd to give you every ounce of speed and handling while descending. Our OCLV Mountain Carbon frame comes with Fox' s Factory Float X2 rear suspension and Active Braking Pivot technology. It's highly adjustable with EVO Link and Mino Link for the ideal geometry wherever you ride.
The final word
Choose your components and Session 27.5 Carbon Frameset is ready to race. Aggressive geometry ushers you to the finish line, while the 27.5˝ wheel spec is great for flicking the bike around. It's our best, most nimble downhill frame.
favorite_borderWhy you'll love it
- Superlight carbon takes us downhill crazy fast, but we don't have to baby it
- Wide-ranging adjustability for the best fit through EVO Link and Mino Link
- 27.5 wheels are great for flicking the bike around through the most technical trail
- Fast 27.5˝ wheels get you down the mountain first
- Mino Link and fixed-angle headset cups let you adjust your geometry for the exact handling you want
A damn fast bike
Session allows you to hit sections at ridiculous speeds and commitment levels. It's been nothing but grin-inducing to get to know the Session so far.
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For riders who charge full speed
A fast, versatile, confidence inspiring downhill bike that will let you push harder and ride faster than you thought you could.
Read moreFeatures
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.
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.
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.
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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.
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 |
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| 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" |
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| Max chainring size | 36T |
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| Headset | FSA Orbit, sealed cartridge bearing, 1-1/8" top, 1.5" bottom (includes geometry-adjust angled cups) |
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| Weight | M - 3.27 kg / 7.2 lbs |
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| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
Sizing & Tech
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.
All measurements provided in cm unless otherwise stated.
| 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 |