2025 Specialized Stumpjumper 15 Pro vs 2023 Specialized Stumpjumper EVO Comp Alloy
The S4 is the Specialized Stumpjumper EVO Comp Alloy size closest to your S4 Specialized Stumpjumper 15 Pro. 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 Pro in S4, the Specialized Stumpjumper EVO Comp Alloy in S4 places the top of the head tube 5 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 3 mm longer, which can contribute to stability at speed.
- Frame stack
- −5 mm
- Lower front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- +3 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Specialized Stumpjumper 15 Pro, S4Specialized Stumpjumper EVO Comp Alloy, S4Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper 15 Pro S4 | Specialized Stumpjumper EVO Comp Alloy S4 | Difference |
|---|---|---|---|
| Reach | 475 | 475mm | ±0 mm |
| Stack | 640 | 635mm | −5 mm |
| Head tube angle | 64.5 | 64.5° | ±0.0° |
| Seat tube angle | 76.5 | 76.9° | +0.4° |
| Effective top tube | 624 | not listed | |
| Chainstay length | 435 | 438mm | +3 mm |
| Wheelbase | 1244 | 1247mm | +3 mm |
| BB drop | 38 | 35mm | −3 mm |
| Seat tube length | 425 | 425mm | ±0 mm |
| Head tube length | not listed | 115mm | |
| BB height | not listed | 340mm | |
| Standover | not listed | 762mm | |
| Fork length | not listed | not listed |
Differences are the Specialized Stumpjumper EVO Comp Alloy minus the Specialized Stumpjumper 15 Pro. Full charts: 2025 Specialized Stumpjumper 15 Pro, 2023 Specialized Stumpjumper EVO Comp Alloy.
Where each sits in its class
Specialized Stumpjumper 15 ProSpecialized 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 15 ProPro | Specialized Stumpjumper EVO Comp AlloyComp Alloy |
|---|---|---|
| Frame | Specialized Stumpjumper 15 | Specialized Stumpjumper EVO |
| Fork | Fox Float 36 Factory GRIP2 | Fox FLOAT 36 Rhythm |
| Rear shock | Fox Float Factory | Fox Float |
| Shifter | SRAM Pod Controller | SRAM GX |
| Derailleur | SRAM X0 Eagle AXS | SRAM GX Eagle |
| Cassette | SRAM X0 Eagle | SRAM GX Eagle |
| Chain | SRAM X0 Eagle Transmission | SRAM NX Eagle |
| Crankset | SRAM X0 Eagle | SRAM X1 Eagle |
| Chainring | SRAM Eagle AXS | Chainring |
| Bottom bracket | SRAM DUB GX | SRAM DUB |
| Wheelset | Roval Traverse SL II | Specialized 29 Disc |
| Tire | Specialized Butcher, Specialized Eliminator | Specialized Butcher, Specialized Eliminator |
| Brake | SRAM Maven Silver Stealth, SRAM Maven Silver | SRAM Code RS |
| Rotor | SRAM HS2 | not listed |
| Handlebar | Specialized Traverse SL | Specialized alloy |
| Stem | Industry Nine Mountain | Specialized Alloy |
| Grips | Deity Lockjaw | not listed |
| Headset | Specialized Angle-Adjust | FSA |
| Dropper post | BikeYoke Revive Max | X-Fusion Manic |
| Saddle | Specialized Bridge Expert | Specialized Bridge |
| Seatpost | not listed | X-Fusion Manic |
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