1. Loading...

2019

Session Al 27.5 Frameset

/
$2,699.99 Model 24517

Session AL 27.5 frameset is a burly alloy downhill mountain bike frame that's equally at home between the tape and at the DH park. It's built for 27.5˝ wheels, with 210mm of travel and a FOX Performance VAN shock tuned by Trek Suspension Lab.

Search store availability

More options

It's right for you if...

You're looking to build a rugged DH or park bike for the biggest trails out there, and want a 27.5˝-optimized frameset with exclusive trail tech, like adjustable Mino Link geometry, that can't be found anywhere else.

The tech you get

A burly Alpha Platinum Aluminum frame with 210mm of travel with an adjustable FOX Performance VAN shock, integrated frame protection, FSA Orbit headset, and exclusive trail tech like ABP and Mino Link. Built for 27.5˝ wheels.

The final word

This burly frameset is perfectly capable of taking on the roughest, fastest descents you can find, and it's equally at home in the park, too. The best DH frame tech, a stable geometry, and a quality shock give you a head start on your dream downhill rig.

favorite_borderWhy you'll love it

  1. 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
  2. Quality FOX Performance suspension and our ABP frame design keep you in control
  3. Race or get rowdy? This bike does both
  4. 27.5 wheels are great for flicking the bike around through the most technical trail
  5. Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride


Features

Specifications

  • Frameset

    Frame
    Alpha Platinum Aluminum, ABP, Full Floater, EVO Link, tapered head tube, Mino Link, integrated frame protection, internal control routing, MicroTruss, down tube guard, ISCG Mount, 210mm travel
    Rear suspension
    Fox Performance VAN, externally adjustable rebound and low-speed compression; (S 400lb; M 450lb; L 500lb; XL 500lb spring), tuned by Trek Suspension Lab, 8.75x2.75˝
  • Components

    Head set
    FSA Orbit, sealed cartridge bearing, 1-1/8˝ top, 1.5˝ bottom
  • Weight

    Weight
    M - 4.22 kg / 9.3 lbs
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorized Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise stated.

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
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
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
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
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
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
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
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
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

Product Compare Rack

Start comparison
Canada / English
You’re looking at the Canada / English Trek Bicycle website. Don’t worry. We’ve all taken a wrong turn before. View your country’s Trek Bicycle website here.