Trek Fuel EX Complete Bike
Lifecycle status:
- Fuel EX 9.9 XX AXS (2025): The catalog records this variant as discontinued. No recorded successor.
- Fuel EX 8 GX AXS T-Type (2024): The catalog records this variant as discontinued. No recorded successor.
What the checker saysnot checked
No fit check runs on a complete bike, and we will not pretend one does. A complete bike does not fill a slot in the builder, so the checker has no counterpart to compare it against and has never produced a single sentence about one.
The checker compares the dimensions listed in what we check, and what we don’t. “No conflicts found” means no conflict among those dimensions — not a guarantee that a build works. Errors mean it won’t fit; warnings mean it works but check; infos are notes.
$3,499.99 to $10,999.99 MSRP
What the maker states
- Wheel configs
- Frame takes 29" and 29"/27.5" wheels
- Travel
- Frame travel 140 mm (maker-stated)
- Shock eye
- Shock eye-to-eye 185 mm
- Shock stroke
- 55 mm
- Shock mount
- Trunnion
- Maximum fork travel
- Approved for a fork up to 160 mm of travel
The maker’s build kit
The maker’s own component list, taken from the page linked below. Nothing on this list has been fit checked as a set.
Fuel EX 9.8 XT Gen 6 (2025)
17 of 22 parts on this list are verified rows here and are linked.
- Frame: Trek Fuel EX C Gen 6
- Fork: Fox 36 Performance 150
- Rear Shock: Fox Float X Performance (185x55 trunnion) (not a verified row in this catalog)
- Front Wheel: Bontrager Line Elite 30 front
- Rear Wheel: Bontrager Line Elite 30 rear (Micro Spline)
- Front Tire: Bontrager SE5 Team Issue 29x2.5 Core Strength (not a verified row in this catalog)
- Rear Tire: Bontrager SE5 Team Issue 29x2.5 Core Strength (not a verified row in this catalog)
- Shifter: Shimano XT M8100 I-Spec
- Rear Derailleur: Shimano XT M8100 SGS
- Cassette: Shimano CS-M8100 10-51
- Chain: Shimano CN-M8100 12-speed
- Crankset: Shimano XT M8120 Boost 30T
- Bottom Bracket: Shimano BB-MT501
- Front Brake: Shimano XT M8120 4-piston
- Rear Brake: Shimano XT M8120 4-piston
- Front Rotor: Shimano SM-RT86 203mm (6-bolt)
- Rear Rotor: Shimano SM-RT86 180mm (6-bolt)
- Handlebar: Bontrager Line Pro Carbon 35
- Stem: Bontrager Line Pro 35 0-Degree
- Grips: Bontrager XR Trail Elite Lock-On (not a verified row in this catalog)
- Dropper Post: Bontrager Line Elite (34.9)
- Saddle: Bontrager Arvada (not a verified row in this catalog)
Fuel EX 9.9 XX AXS (2025)
16 of 22 parts on this list are verified rows here and are linked.
- Frame: Trek Fuel EX C Gen 6
- Fork: Fox 36 Factory 150
- Rear Shock: Fox Float X Factory (185x55 trunnion)
- Front Wheel: Bontrager Line Pro 30 front (carbon)
- Rear Wheel: Bontrager Line Pro 30 rear 29 (carbon, XD)
- Front Tire: Bontrager SE5 Team Issue 29x2.5 Core Strength (not a verified row in this catalog)
- Rear Tire: Bontrager SE5 Team Issue 29x2.5 Core Strength (not a verified row in this catalog)
- Shifter: SRAM XX SL Transmission Pod (not a verified row in this catalog)
- Rear Derailleur: SRAM XX Eagle Transmission
- Cassette: SRAM XS-1297 XX Eagle Transmission 10-52
- Chain: SRAM XX Eagle Transmission Flattop
- Crankset: SRAM XX Eagle Transmission DUB
- Bottom Bracket: SRAM DUB BSA 73
- Front Brake: SRAM Maven Ultimate
- Rear Brake: SRAM Maven Ultimate
- Front Rotor: SRAM HS2 200mm
- Rear Rotor: SRAM HS2 180mm
- Handlebar: Bontrager RSL Integrated (bar half) (not a verified row in this catalog)
- Stem: Bontrager RSL Integrated (stem half)
- Grips: Bontrager XR Trail Elite Lock-On (not a verified row in this catalog)
- Dropper Post: RockShox Reverb AXS B1 (34.9)
- Saddle: Bontrager Arvada (not a verified row in this catalog)
Fuel EX 8 GX AXS T-Type (2024)
18 of 22 parts on this list are verified rows here and are linked.
- Frame: Trek Fuel EX AL Gen 6
- Fork: Fox 36 Performance 150
- Rear Shock: Fox Float X Performance (185x55 trunnion) (not a verified row in this catalog)
- Front Wheel: Bontrager Line Comp 30 front (29)
- Rear Wheel: Bontrager Line Comp 30 rear (29, XD)
- Front Tire: Bontrager XR5 Team Issue 29x2.5
- Rear Tire: Bontrager XR5 Team Issue 29x2.5
- Shifter: SRAM GX Transmission Pod (not a verified row in this catalog)
- Rear Derailleur: SRAM GX Transmission
- Cassette: SRAM XS-1275 Transmission 10-52
- Chain: SRAM Flattop (Transmission)
- Crankset: SRAM GX Eagle Transmission DUB
- Bottom Bracket: SRAM DUB BSA 73
- Front Brake: SRAM DB8
- Rear Brake: SRAM DB8
- Front Rotor: SRAM CenterLine 200mm (6-bolt)
- Rear Rotor: SRAM CenterLine 180mm (6-bolt)
- Handlebar: Bontrager Line Alloy 35 820
- Stem: Bontrager Elite 45 0-Degree
- Grips: Bontrager XR Trail Elite Lock-On (not a verified row in this catalog)
- Dropper Post: Bontrager Line Elite (34.9)
- Saddle: Bontrager Verse P3 (not a verified row in this catalog)
3 verified variants
| Variant | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|
| Fuel EX 9.8 XT Gen 6 (2025) | $7,149.99 | not stated | maker’s page | 2026-07-21 | Build with this |
| Fuel EX 9.9 XX AXS (2025) | $10,999.99 | not stated | maker’s page | 2026-07-21 | Build with this |
| Fuel EX 8 GX AXS T-Type (2024) | $3,499.99 | not stated | maker’s page | 2026-07-21 | Build with this |
What the maker states1 not published
1 further field the checker looks for is not published by Trek, so we leave it blank rather than estimate it, and that check stays silent on this complete bike. It is rotor adapter documented. Each is recorded as “not stated by the maker (not checked)”.
Source: each variant links the maker’s own page in the table above. Last checked 2026-07-21.
Where this sits
Trek Fuel EX is the first model on that list.Next: Trek MarlinAll Trek complete bikesOpen a variant in the builder to see the ones that apply to your own parts