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

Ideal for you!

You have refined taste and don't settle for just any mountain bike. You want a bike built to tackle the mountain from all angles and dominate it with the best available technology, such as a lightweight and rigid carbon frame, wheels that can follow the most elusive lines, a FOX Factory fork, and a top-level, completely wireless SRAM XX drivetrain.

The technology you get

An OCLV Mountain carbon frame with lightweight carbon wheels and SRAM's top-tier wireless XX AXS electronic drivetrain with a direct mount chainring. A smooth 150mm FOX Factory 36 fork with Float EVOL air spring and GRIP2 damper, FOX Factory Float X rear suspension with 140mm of travel, and RockShox Reverb AXS dropper post. All of this is complemented by adjustable geometry to tailor the bike to your riding style, along with an internal frame storage compartment to keep your bike looking tidy while carrying essential trail tools and accessories.

The final word

The Fuel EX 9.9 is a bike built to satisfy the most refined tastes. It pairs an all-mountain capable carbon frame with the best components you can find on a modern mountain bike, from the carbon rims to the ultra-lightweight SRAM XX AXS wireless drivetrain. All of this is enhanced by adjustable geometry that allows you to configure the bike according to your preferences.

Here’s why you’ll love it

• In addition to a sturdier frame with internal storage, the Fuel EX Gen 6 offers a 140/150mm suspension system with extra adjustment features for more stable handling.
• We've expanded our size range to ensure a frame that fits every body type and allows the use of the most suitable wheels: 27.5" on XS frames; 27.5" or 29" on S frames, and up to 29" on M frames and above.
• The new SRAM T-Type drivetrain offers superior performance and durability with precise shifts, even under load, thanks to proven wireless technology.
• The internal frame storage compartment simplifies carrying essential gear while keeping your setup neat and sleek.
• The adjustable-angle head tube (angled cups sold separately) and Mino Link allow you to choose from six different geometries.

FRAME KIT

• Frame: OCLV Mountain Carbon, internal storage compartment, adjustable-angle headset, Mino Link adjustable geometry, adjustable leverage 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 air spring, GRIP X2 damper, tapered steerer tube, 44mm offset, Boost110, Kabolt X 15mm axle, direct mount 180mm brake mounts, 140mm travel
  - Size: M, ML, L, XL - Fox Factory 36, Float EVOL air spring, GRIP X2 damper, tapered steerer tube, 44mm offset, Boost110, Kabolt X 15mm axle, direct mount 180mm brake mounts, 150mm travel
• Suspension: Fox Factory Float X, 2-position damper, 185mm x 55mm
  Max fork travel compatibility: 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
• Tire:
  - 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, aramid bead, 120tpi, 29x2.50"
  - Size: M, ML, L, XL - Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60tpi, 29x2.50"
• Tire sealant: Bontrager TLR, 6oz
• Nipple protection: Bontrager TLR
• Max tire size: Frame: 29x2.60" (XS: 27.5x2.60"), Fork: see manufacturer

DRIVETRAIN

• Rear derailleur: SRAM XX Eagle AXS, T-Type
• Crankset: SRAM XX Eagle, DUB, 30 teeth, T-Type, 55mm chainline, 170mm length
• Bottom bracket: SRAM DUB MTB Wide, 73mm, BSA threaded
• Cassette: SRAM Eagle XS-1297, T-Type, 10-52, 12-speed
• Chain: SRAM XX Eagle, T-Type, 12-speed
• Max chainring size: 1x: 36t, min 32t

COMPONENTS

• Saddle: Verse Short Pro, carbon rails, 145mm width
• Seatpost:
  - 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 bearings, 1-1/8” upper, 1.5” lower, compatible with adjustable-angle cup
• Brakes: SRAM Maven Ultimate hydraulic disc brakes, 4-piston
• Brake rotor:
  - 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 - 14.48 kg / 31.93 lbs (with TLR sealant, without inner tube)
• Weight limit: This bike has a maximum total weight limit (combined weight of bike, rider, and load) of 136 kg.

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.