Session 9.9 is the pinnacle of downhill mountain bike performance. It's built for one reason: going as fast as freakin' possible down hills. It pairs proven Shimano Saint parts with our premium OCLV Mountain Carbon frame and FOX Factory suspension with super-fast 29" wheels. This is the same DH bike the pros ride, and the bike of choice for World Champion Gee Atherton.

You want the fastest downhill bike that we offer. You want the speed of 29? wheels and the stability of a full-on DH frame. You seek out the fastest lines and the biggest jumps. You like to dial in your ride, and want the ability to fine-tune your suspension, fit and handling on a bike that makes no compromises.

An OCLV Mountain Carbon frame, 190 mm tunable front and rear FOX Factory air suspension, Bontrager Line DH wheels and proven Shimano Saint drivetrain and brakes. This is a full-on DH racing bike, and it's built so you can refine your set-up for your fastest runs with Mino Link and has an adjustable fixed-angle headset.

Best frame, best suspension, best parts and fast-rolling 29? wheels. This is the only choice if you're a true DH devotee. Session 9.9 is simply the fastest bike on the mountain, even when that mountain is a stop on the World Cup circuit.
- It's like a precision wrecking ball that gives you the confidence to tear down mountains and take the fastest, burliest lines
- The fastest runs demand the most dialled set-up: the air shock and fork on Session 9.9 are adjustable and easy to fine-tune for different tracks
- Mino Link and fixed-angle headset cups let you adjust your geometry for your personal handling requirements

OCLV Mountain Carbon
Trek's mountain-specific carbon fibre is tougher carbon, with unique materials and lay-up procedures, Trek's advanced engineering, and a higher standard of testing.



Active Braking Pivot
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.