2026 Trek Fuel EX vs 2025 Specialized Enduro
The S4 is the Specialized Enduro size closest to your L Trek Fuel EX. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Specialized Enduro
Compared with the Trek Fuel EX in L, the Specialized Enduro in S4 places the top of the head tube 9 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 12 mm longer, which can contribute to stability at speed.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +12 mm
- Longer: steadier at speed
- Head angle
- −0.6°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Trek Fuel EX, LSpecialized Enduro, S4Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX L | Specialized Enduro S4 | Difference |
|---|---|---|---|
| Reach | 485 | 487mm | +2 mm |
| Stack | 638 | 629mm | −9 mm |
| Head tube angle | 64.5 | 63.9° | −0.6° |
| Seat tube angle | 77.4 | 76° | −1.4° |
| Effective top tube | 617 | not listed | |
| Chainstay length | 442 | 442mm | ±0 mm |
| Wheelbase | 1262 | 1274mm | +12 mm |
| BB drop | 35 | not listed | |
| BB height | 339 | not listed | |
| Seat tube length | 420 | 440mm | +20 mm |
| Head tube length | 125 | 110mm | −15 mm |
| Fork length | not listed | not listed |
Differences are the Specialized Enduro minus the Trek Fuel EX. Full charts: 2026 Trek Fuel EX, 2025 Specialized Enduro.
Where each sits in its class
Trek Fuel EXSpecialized Enduro
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Trek Fuel EX5 | Specialized EnduroS-Works |
|---|---|---|
| Frame | Trek Fuel EX | not listed |
| Fork | RockShox Recon Silver RL | not listed |
| Rear shock | X-Fusion Pro 2 | RockShox Vivid Ultimate |
| Shifter | Shimano Deore M6100 | not listed |
| Derailleur | Shimano Deore M6100 | not listed |
| Cassette | Shimano Deore M6100 | not listed |
| Chain | Shimano Deore M6100 | not listed |
| Crankset | Shimano MT512 | not listed |
| Chainring | Shimano MT512 | not listed |
| Bottom bracket | Shimano MT501 | not listed |
| Wheelset | Bontrager Line TLR 30 | not listed |
| Tire | Bontrager Gunnison Elite XR | not listed |
| Rim | Bontrager Line TLR 30 | not listed |
| Brake | Shimano MT200 | not listed |
| Rotor | Shimano SM-RT10 | not listed |
| Handlebar | Bontrager Comp | not listed |
| Stem | Bontrager Comp | not listed |
| Grips | Trek Line | not listed |
| Headset | Trek ZS Headset | not listed |
| Dropper post | TranzX JD-YSI34 | not listed |
| Seatpost | TranzX JD-YSI34 | not listed |
| Saddle | Trek Verse Short | not listed |
Know what is on every bike.
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