Fuel EX 9.9 makes no compromises. Top-shelf suspension, carbon everything and a super-smooth Shimano XTR drive train make this ripper ready to rule any trail in style. It's fast, it's light, and it's got everything you need to crush your next trail ride.

You want a bike as versatile as you are, and you're demanding - of yourself and of your equipment. You want the lightest weight, the most adjustability and the highest precision so the last thing you have to worry about on your next adventure is your bike.

A light and stiff OCLV Mountain Carbon frame with internal storage, FOX Factory suspension with Kashima Coat and an efficient yet plush RE:aktiv with Thru Shaft damper. A Shimano XT 1x12 drive train for super-smooth shifting that's easy on the thumb - plus an extra-low 51-tooth climbing gear, and Bontrager carbon wheels and loads of other carbon parts for lower weight and elevated good looks.

If you can have just one mountain bike, this is it. Fuel EX 9.9 has the lightest parts with the most adjustability and precision. It's equally at home on fast, flowy singletrack, brutal leg-busting climbs and gnarly arm-pumping descents.
- Fuel EX 9.9 is for riders who want the best in everything. It's dripping with carbon and has the latest in suspension and drive train tech
- RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
- The Fox Factory 36 fork gives you four-way damping adjustments, plus you get Kashima Coat for smoother, more durable stanchions
- We expanded our size range to ensure a better fit for all riders. And, you get the fastest wheel that fits your frame: XS frames get 27.5? wheels, S frames get to choose between 27.5? or 29? and sizes M to XL get 29? wheels

Will my bike have a curved top tube?
Smaller frames (XS and S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically don't have the same issues with standover height.

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.

Internal Storage
Internal frame storage makes it easy to ditch the pack and still carry your ride essentials.

RE:aktiv with Thru Shaft
RE:aktiv with Thru Shaft gives you unmatched grip and control with a shock that reacts to the terrain faster than anything else out there.

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.