Trek Fuel EX 9.9 X0 AXS T-Type Gen 6 (2025)

Ideal for you!

You have refined taste and won't settle for just any mountain bike. You want a bicycle built to take on the mountain from every angle and dominate it with the best available technology, such as a lightweight and stiff carbon frame, wheels that can follow the most elusive lines, a FOX Factory fork, and a high-end, fully wireless SRAM X0 drivetrain.

The technology you get

An OCLV Mountain carbon frame with lightweight carbon wheels and SRAM's top-of-the-line wireless X0 AXS electronic drivetrain with a direct mount chainring. A fluid FOX Factory 36 fork with 150mm travel, Float EVOL spring, and GRIP X2 damper, a FOX Factory Float X rear shock with 140mm of travel, and a RockShox Reverb AXS dropper post. All of this is complemented by an adjustable geometry to tailor the bike to your riding style and an internal frame storage compartment to keep your bike aesthetically neat without sacrificing essential tools and trail accessories.

The final word

Fuel EX 9.9 is a bike built to satisfy the most refined tastes. It combines an all-mountain-ready carbon frame with the best components you can find on a modern mountain bike, from the carbon wheels to the rugged SRAM X0 AXS wireless drivetrain. It’s all enhanced with adjustable geometry that allows you to configure the bike to your desires.

Here’s why you’ll love it

• In addition to a more robust frame with internal storage, Fuel EX Gen 6 offers a 140/150mm suspension system with extra adjustability for more stable handling.
• We have expanded our size range to ensure a frame suited for every body type and to use the most appropriate wheels: 27.5" on XS frames; 27.5" or 29" on S frames, and up to 29" on M to XL frames.
• It’s ready to fly with lightweight carbon wheels that easily handle even the roughest terrain and stay on track when the trail gets turbulent. The internal storage compartment simplifies carrying essential gear while maintaining a tidy and sleek setup.
• The adjustable-angle headset (angled cups sold separately) and Mino Link allow for six different geometry options.

FRAME KIT

• Frame: OCLV Mountain carbon, internal storage compartment, adjustable-angle headset, Mino Link adjustable geometry, adjustable lever ratio, internal cable routing, magnesium rocker link, 34.9mm seat tube, ISCG 05, 55mm chainline, BSA 73, downtube protection, transport protection, ABP, UDH, Boost148, 140mm travel
• Fork:
  - Size: XS, S - Fox Factory 36, Float EVOL pneumatic spring, GRIP X2 damper, tapered steerer, 44mm offset, Boost110, Kabolt X 15mm axle, 180mm direct mount brake mounts, 140mm travel
  - Size: M, ML, L, XL - Fox Factory 36, Float EVOL pneumatic spring, GRIP X2 damper, tapered steerer, 44mm offset, Boost110, Kabolt X 15mm axle, 180mm direct mount brake mounts, 150mm travel
• Suspension: Fox Factory Float X, 2-position damper, 185mm x 55mm
• Max compatible fork travel: 160mm, XS/S: 150mm

WHEELS

• Front wheel:
  - Size: XS, S - Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru-axle, 27.5"
  - Size: M, ML, L, XL - Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru-axle, 29"
• Rear wheel:
  - Size: XS, S - Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru-axle, 27.5"
  - Size: M, ML, L, XL - Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru-axle, 29"
• Rear axle: Bontrager Switch Thru-Axle, removable lever
• Tires:
  - Size: XS, S - Bontrager SE5 Team Issue, Tubeless Ready, Inner Strength sidewall protection, aramid bead, 120tpi, 27.5x2.50”
  - Size: XS, S - Bontrager SE5 Team Issue, Tubeless Ready, Inner Strength sidewall protection, aramid bead, 60tpi, 27.5x2.50”
  - Size: M, ML, L, XL - Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall protection, aramid bead, 120tpi, 29x2.50”
  - Size: M, ML, L, XL - Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall protection, aramid bead, 60tpi, 29x2.50”
• Tire sealant: Bontrager TLR Sealant, 6oz
• Nipple protector: Bontrager TLR
• Max tire size: Frame: 29x2.60" (XS: 27.5x2.60"), Fork: See manufacturer

DRIVETRAIN

• Rear derailleur: SRAM X0 Eagle AXS, T-Type
• Crankset: SRAM X0 Eagle, DUB, 30T, T-Type, 55mm chainline, 170mm length
• Bottom bracket: SRAM DUB MTB Wide, 73mm, BSA threading
• Cassette: SRAM Eagle XS-1295, T-Type, 10-52, 12-speed
• Chain: SRAM X0 Eagle, T-Type, 12-speed
• Max chainring size: 1x: 36T, min 32T

COMPONENTS

• Saddle: Verse Short Pro, carbon rails, 145mm width
• Dropper post:
  - Size: XS, S - RockShox Reverb AXS, 100mm travel, wireless, 34.9mm, 340mm length
  - Size: M, ML - RockShox Reverb AXS, 150mm travel, wireless, 34.9mm, 440mm length
  - Size: L, XL - RockShox Reverb AXS, 170mm travel, wireless, 34.9mm, 480mm length
• Handlebar: Bontrager Line Pro, OCLV carbon, 35mm, 27.5mm rise, 780mm width
• Grips: Bontrager XR Trail Elite, nylon locking
• Stem: Bontrager Line Pro, 35mm, Blendr compatibility, 0 degrees, 35mm length
• Headset: Integrated cartridge bearing, 1-1/8” upper, 1.5” lower, compatible with adjustable-angle cups
• Brakes: SRAM Maven Silver, 4-piston hydraulic disc
• Brake rotors:
  - Size: XS, S, M, ML, L, XL - SRAM HS2, 6-bolt, 180mm
  - Size: M, ML, L, XL - SRAM 6-bolt, 200mm
• Max rotor size: Frame: 203mm, min 180mm, Fork: see fork manufacturer

ACCESSORIES

• Tool: Bontrager BITS integrated multi-tool

WEIGHT

• Weight: M - 14.78kg / 32.59 lbs (with TLR sealant, without inner tube)
• Weight limit: This bike has an overall weight limit (combined weight of bike, rider, and gear) of 136kg.

The manufacturer reserves 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, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. The prices shown are the manufacturer's suggested retail prices.