2026 Specialized Stumpjumper 15 EVO vs 2025 Trek Fuel EX
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Trek Fuel EX
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- −16 mm
- Shorter: quicker to change direction
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Specialized Stumpjumper 15 EVO numbers we have for size S4 are missing the reach and stack. The numbers below still compare.
Geometry side by side
| Measurement | Specialized Stumpjumper 15 EVO S4 | Trek Fuel EX ML | Difference |
|---|---|---|---|
| Head tube angle | 64 | 64.5 | +0.5° |
| Seat tube angle | 76.0 | not listed | |
| Effective top tube | 625 | 607.4 | −18 mm |
| Chainstay length | 435 | 440 | +5 mm |
| Wheelbase | 1249 | 1233.1 | −16 mm |
| BB drop | 35 | 38 | +3 mm |
| BB height | 340 | 335 | −5 mm |
| Standover | 745 | 741.8 | −3 mm |
| Seat tube length | 425 | 420 | −5 mm |
| Head tube length | 125 | 100 | −25 mm |
| Reach | not listed | 470 | |
| Stack | not listed | 616.8 |
Differences are the Trek Fuel EX minus the Specialized Stumpjumper 15 EVO. Full charts: 2026 Specialized Stumpjumper 15 EVO, 2025 Trek Fuel EX.
Where each sits in its class
Specialized Stumpjumper 15 EVOTrek Fuel EX
AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted
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 | Specialized Stumpjumper 15 EVOS-Works | Trek Fuel EX5 |
|---|---|---|
| Frame | Specialized FACT 11m Carbon | Trek Fuel EX |
| Fork | Fox 36 Factory GRIP X2 | RockShox Recon Silver |
| Rear shock | Fox Float X Factory | X-Fusion Pro 2 |
| Shifter | Shimano XTR M9250 | Shimano Deore M6100 |
| Derailleur | Shimano XTR | Shimano Deore M6100 |
| Cassette | Shimano XTR M9250 | Shimano Deore M6100 |
| Chain | Shimano XTR | Shimano Deore M6100 |
| Crankset | Shimano XTR | Shimano MT512 |
| Chainring | Shimano XTR | not listed |
| Bottom bracket | Shimano BB93 | Shimano MT501 |
| Wheelset | Roval Traverse SL II | Bontrager Line TLR 30 |
| Tire | Specialized Butcher, Specialized Eliminator | Bontrager Gunnison Elite XR |
| Hub | Industry Nine Hydra 2 | not listed |
| Rim | Roval Traverse SL | not listed |
| Brake | Shimano XTR | Shimano MT200 |
| Rotor | Shimano XTR | Shimano SM-RT56 |
| Handlebar | Race Face ERA | TranzX JD-YSI-22PLQ |
| Stem | Race Face Turbine R | Bontrager Comp |
| Grips | Deity Lockjaw | Bontrager XR Trail |
| Dropper post | Fox Transfer Neo | TranzX JD-YSI-22PLQ |
| Seatpost | dropper | not listed |
| Saddle | Specialized S-Works Power Mirror | Bontrager Arvada |
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