Fuel EX 9.9 makes no compromises. Top-shelf suspension, carbon everything and SRAM's latest X01 Eagle AXS wireless 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 fully wireless SRAM X01 Eagle AXS 1x12 electronic drive train and RockShox Reverb AXS dropper post. Plus, Bontrager Line Pro 30 wheels with a 108-tooth Rapid Drive rear hub for quick engagement and a Bontrager Line Pro OCLV Carbon handlebar.

If you can have just one mountain bike, this is it. Fuel EX 9.9 has the lightest, most advanced 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.
- The SRAM X01 Eagle AXS drive train is smart, smooth and completely wireless
- 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.