Trek Fuel EX 8 XT Gen 6 (2025)

It's right for you if...

You want a full-suspension trail bike that floats over rough and technical terrain, and packs in plusses, like a root-slaying FOX Rhythm fork and Shimano's clean-shifting 12-speed XT drivetrain.

The tech you get

A light and stiff alloy frame with 150 mm FOX Rhythm fork with Float EVOL air spring and GRIP damper for small bump compliance, plus a FOX Performance Float X rear shock. A Shimano XT 12-speed drivetrain for snappy shifting and Tubeless-Ready Bontrager wheels. Plus, adjustable geometry that lets you take control of your set-up.

The final word

For the rider who doesn't want to be limited on the trail, the Fuel EX 8 is ready to handle everything. Its progressive trail geometry is built to keep you charging, and upgraded components are the cherry on top.

Why you'll love it

• The Fuel EX Gen 6 gives you 140/150 mm of travel with extra adjustability features and more stable handling, plus a more robust frame with internal storage
• You'll get upgraded components where it matters most, with 12-speed XT shifting and a rock-gobbling FOX Rhythm 36 fork
• With the adjustable angle headset (angled cups sold separately) and Mino Link, you can choose from six different geometry configurations
• The dropper post lets you lower your saddle on the fly so it's out of the way on descents
• We expanded our size range to ensure a better fit for all riders, and use the best-fitting wheels for each frame size: XS frames get 27.5˝ wheels, S frames get to choose between 27.5˝ or 29˝, and sizes M and up get 29˝ wheels 

FRAMESET

• Frame : Alpha Platinum Aluminium, internal storage, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, guided internal routing, magnesium rocker link, 34.9 mm seat tube, ISCG 05, 55 mm chain line, BSA 73, downtube guard, shuttle guard, ABP, UDH, Boost148, 140 mm travel
• Fork:
  • Size: XS , S. Fox Rhythm 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 140 mm travel
  • Size: M , ML , L , XL , XXL: Fox Rhythm 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 150 mm travel
• Shock: Fox Performance Float X, 2-position damper, 185 mm x 55 mm
• Max compatible fork travel: 160 mm, XS/S: 150 mm

WHEELS

• Wheel front:
  • Size: XS , S: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5"
  • Size: M , ML , L , XL , XXL: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29"
• Wheel rear:
  • Size: XS , S: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12 mm thru axle, 27.5"
  • Size: M , ML , L , XL , XXL: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12 mm thru axle, 29"
• Skewer rear: Bontrager Switch thru-axle, removable lever
• Tyre:
  • Size: XS , S: Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 60 tpi, 27.5 x 2.50"
  • Size: XS , S: Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 60 tpi, 27.5x2.50"
  • Size: M , ML , L , XL , XXL: Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 60 tpi, 29x2.50"
• Tyre part: Bontrager TLR sealant, 180 ml/6 oz
• Max tyre size: Frame: 29x2.50" (XS & S: 27.5x2.50"), Fork: See manufacturer

DRIVETRAIN

• Shifter: Shimano XT M8100, 12-speed
• Rear derailleur: Shimano XT M8100, long cage
• Crank: Shimano Deore M6120, 30T ring, 55 mm chainline, 170 mm length
• Bottom bracket: Shimano BB-MT501 BSA
• Cassette: Shimano XT M8100, 10-51, 12-speed
• Chain: Shimano SLX M7100, 12-speed
• Max. chainring size: 1x: 34T round, 32T oval, min 28T

COMPONENTS

• Saddle:
  • Size: XS , S , M , ML , L , XL , XXL: Bontrager Verse P3, chromoly rails
  • Size: XS , S , M , ML , L , XL , XXL: Bontrager Arvada, hollow chromoly rails, 138 mm width
• Seatpost
  • Size: XS , S: TranzX JD-YSP39, 100 mm travel, internal routing, 34.9 mm
  • Size: XS , S: Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9 mm, 310mm length
  • Size: M , ML: TranzX JD-YSP39, 150 mm travel, internal routing, 34.9 mm
  • Size: M , ML: Bontrager Line Dropper, 150mm travel, MaxFlow, internal routing, 34.9 mm, 410 mm length
  • Size: L , XL , XXL: TranzX JD-YSP39, 170 mm travel, internal routing, 34.9 mm
  • Size: L , XL , XXL: Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 450 mm length
• Handlebar:
  • Size: XS , S: Bontrager Line, alloy, 35 mm, 27.5 mm rise, 750 mm width
  • Size: M , ML , L , XL , XXL: Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
• Grips: Bontrager XR Trail Elite, nylon lock-on
• Stem:
  • Size: XS , S: Bontrager Elite, 35 mm, 0-degree, 35 mm length
  • Size: M , ML , L , XL , XXL: Bontrager Elite, 35 mm, 0-degree, 45 mm length
• Brake: Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper
• Brake rotor:
  • Size: XS , S , M , ML , L , XL , XXL: Shimano RT66, 6-bolt, 203 mm
  • Size: XS , S , M , ML , L , XL , XXL: Shimano RT66, 6-bolt, 180 mm
• Rotor size: Max brake rotor sizes - Frame: 203mm, Fork: see fork manufacturer

WEIGHT

• Weight: M - 15.91 kg / 35.08 lbs (with TLR sealant, no tubes)
• Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).

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.