2025 Specialized Stumpjumper 15 vs 2023 Specialized Stumpjumper EVO Comp Alloy
The S1 is the Specialized Stumpjumper EVO Comp Alloy size closest to your S1 Specialized Stumpjumper 15. 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 Stumpjumper EVO Comp Alloy
Compared with the Specialized Stumpjumper 15 in S1, the Specialized Stumpjumper EVO Comp Alloy in S1 places the top of the head tube 5 mm higher and 8 mm further forward, relative to the bottom bracket. Its wheelbase is 18 mm longer, which can contribute to stability at speed.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- +8 mm
- Longer frame reach
- Wheelbase
- +18 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +8 mm
- Longer: more planted
The two frames
Specialized Stumpjumper 15, S1Specialized Stumpjumper EVO Comp Alloy, S1Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper 15 S1 | Specialized Stumpjumper EVO Comp Alloy S1 | Difference |
|---|---|---|---|
| Reach | 400 | 408mm | +8 mm |
| Stack | 608 | 613mm | +5 mm |
| Head tube angle | 64.5 | 64.5° | ±0.0° |
| Seat tube angle | 78 | 78° | ±0.0° |
| Effective top tube | 541 | not listed | |
| Chainstay length | 430 | 438mm | +8 mm |
| Wheelbase | 1149 | 1167mm | +18 mm |
| BB drop | 41 | 40mm | −1 mm |
| BB height | 334mm | 335mm | +1 mm |
| Standover | 738mm | 733mm | −5 mm |
| Seat tube length | 385 | 385mm | ±0 mm |
| Fork length | 551mm | 561mm | +10 mm |
| Head tube length | 95 | 95mm | ±0 mm |
Differences are the Specialized Stumpjumper EVO Comp Alloy minus the Specialized Stumpjumper 15. Full charts: 2025 Specialized Stumpjumper 15, 2023 Specialized Stumpjumper EVO Comp Alloy.
Where each sits in its class
Specialized Stumpjumper 15Specialized Stumpjumper EVO Comp Alloy
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 15S-Works | Specialized Stumpjumper EVO Comp AlloyComp Alloy |
|---|---|---|
| Frame | Specialized FACT 11m | Specialized Stumpjumper EVO |
| Fork | Fox Float 36 Factory | Fox FLOAT 36 Rhythm |
| Rear shock | Fox FLOAT Factory | Fox Float |
| Shifter | SRAM Pod Controller Ultimate | SRAM GX |
| Derailleur | SRAM XX Eagle Transmission | SRAM GX Eagle |
| Cassette | SRAM XX Eagle SL Transmission | SRAM GX Eagle |
| Chain | SRAM XX Eagle SL Transmission | SRAM NX Eagle |
| Crankset | SRAM XX Eagle | SRAM X1 Eagle |
| Chainring | SRAM XX Eagle | Chainring |
| Bottom bracket | SRAM DUB | SRAM DUB |
| Wheelset | Roval Traverse SL II | Specialized 29 Disc |
| Tire | Specialized Butcher, Specialized Eliminator | Specialized Butcher, Specialized Eliminator |
| Hub | DT Swiss 240 | not listed |
| Rim | Roval Traverse SL II | not listed |
| Brake | SRAM Maven Ultimate | SRAM Code RS |
| Rotor | SRAM Maven, SRAM HS2 | not listed |
| Handlebar | Roval Traverse SL | Specialized alloy |
| Stem | Specialized Deity | Specialized Alloy |
| Grips | Deity Lockjaw | not listed |
| Headset | Specialized Angle-Adjust | FSA |
| Dropper post | RockShox Reverb | X-Fusion Manic |
| Seatpost | RockShox Reverb AXS | X-Fusion Manic |
| Saddle | Specialized Power Pro Mirror | Specialized Bridge |
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