A 29er Downhill Frameset Built for Aggressive, Fast Descents

The Trek Session C 29 Frameset is a production 29-inch downhill mountain bike frame built around OCLV Mountain Carbon — Trek's mountain-specific carbon construction developed with unique materials, layup procedures, and a higher standard of testing than standard carbon fibre. The Session C 29 is described as the product of nearly a decade of research and development by Trek's engineering and design team, focused specifically on advancing downhill capability and speed in a 29er platform.

The geometry is described as long, stable, and aggressive — characteristics suited to high-speed descending where stability at pace and confidence through technical terrain are the primary demands. The Session 29 platform has been used on the World Cup circuit among the first production 29er downhill bikes, and Reece Wilson of Trek Factory Racing took a World Championship aboard the Session during competition — a competitive context that reflects the platform's development intent.

This is a frameset only. The fork, rear shock, wheels, drivetrain, cockpit, and all other components are not included and must be sourced separately as part of the build.

• We put a whole lot into this bike, including nearly a decade of research and development by engineers and designers who wanted to break the mold of DH capability and speed—and they succeeded
• Session 29 is taking downhill to a new place, and it's leading the charge on the World Cup circuit among the very first 29er DH bikes
• Mino Link and fixed-angle headset cups let you adjust your geometry for the exact handling you want

Active Braking Pivot and Mino Link Geometry Adjustment

Two distinct engineering features define the Session C 29 frameset's handling character. The first is Active Braking Pivot — a suspension design that allows Trek's engineers to tune the frame's response to acceleration and braking forces independently of one another. In practice this means the suspension maintains sensitivity and composure under hard braking on steep descents, where many suspension designs are forced to compromise between braking performance and suspension function. The result is more confident and predictable control in the situations where it matters most during downhill riding.

The second is the Mino Link — a flip chip located in the rear suspension linkage that allows the rider to adjust the frame geometry between two settings. Fixed-angle headset cup compatibility extends this further, giving riders the ability to alter the head tube angle for the exact handling character they want from the bike. The combination of Mino Link and headset angle adjustment provides meaningful geometry tuning without requiring a new frame, allowing the Session C 29 to be configured more specifically for different trail profiles, rider preferences, or racing requirements.

OCLV Mountain Carbon — Tougher by Design

OCLV Mountain Carbon is Trek's purpose-built mountain bike carbon fibre construction, distinguished from standard carbon by its specific material selection and layup procedures developed to handle the demands of aggressive trail and downhill riding. Trek describes it as tougher carbon, tested to a higher standard than general carbon fibre construction — a distinction that matters on a downhill platform expected to absorb repeated high-speed impacts and the dynamic loading that characterises gravity riding.

The Session C 29 frameset is long and aggressive in geometry — not a design optimised for versatility across multiple disciplines, but one dialled specifically for the demands of downhill racing and fast descending. The 29-inch wheel platform contributes to the rolling speed and obstacle rollover capability that 29ers are known for, applied here specifically to the downhill context.

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.

FAQs

What wheel size does the Trek Session C 29 Frameset use?

The Session C 29 is designed for 29-inch wheels — a wheel size that contributes to rolling speed and obstacle rollover capability in a downhill riding context.

What carbon construction is used in the Session C 29?

The frameset is built from OCLV Mountain Carbon, Trek's mountain-specific carbon fibre construction developed with unique materials, layup procedures, and a higher testing standard than standard carbon fibre.

What is Active Braking Pivot?

Active Braking Pivot is a suspension design feature that allows Trek's engineers to tune how the suspension responds to acceleration and braking forces independently. This provides more confident and predictable control under hard braking during descents.

What geometry adjustment options does the Session C 29 offer?

The frame includes a Mino Link flip chip for geometry adjustment between two settings. It is also compatible with fixed-angle headset cups, allowing further head tube angle adjustment to suit rider preference or trail conditions.

Are components included with the Session C 29 Frameset?

No. This is a frameset only. The fork, rear shock, wheels, drivetrain, cockpit, and all other components must be sourced separately.

What riding discipline is the Session C 29 designed for?

The Session C 29 is specifically designed for downhill mountain biking. The geometry is described as long, stable, and aggressive — optimised for fast descending rather than all-round trail riding.

Has the Session 29 been used in professional competition?

Yes. The Session 29 platform has been used on the World Cup downhill circuit. Trek Factory Racing's Reece Wilson won a World Championship title aboard the Session during competition.

Specs:

Geometry Chart