2025 Specialized Stumpjumper 15 Comp Alloy vs 2023 Specialized Stumpjumper EVO Comp Alloy
The S4 is the Specialized Stumpjumper EVO Comp Alloy size closest to your S4 Specialized Stumpjumper 15 Comp Alloy. 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 Comp Alloy 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 Comp Alloy, S4Specialized Stumpjumper EVO Comp Alloy, S4Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper 15 Comp Alloy 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 |
| BB height | 337 | 340mm | +3 mm |
| Standover | 745 | 762mm | +17 mm |
| Seat tube length | 425 | 425mm | ±0 mm |
| Fork length | 561mm | not listed | |
| Head tube length | 125 | 115mm | −10 mm |
Differences are the Specialized Stumpjumper EVO Comp Alloy minus the Specialized Stumpjumper 15 Comp Alloy. Full charts: 2025 Specialized Stumpjumper 15 Comp Alloy, 2023 Specialized Stumpjumper EVO Comp Alloy.
Where each sits in its class
Specialized Stumpjumper 15 Comp AlloySpecialized 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 Comp AlloyComp Alloy | Specialized Stumpjumper EVO Comp AlloyComp Alloy |
|---|---|---|
| Frame | Specialized Stumpjumper 15 | Specialized Stumpjumper EVO |
| Fork | Fox FLOAT 36 Rhythm | Fox FLOAT 36 Rhythm |
| Rear shock | Fox Float Performance | Fox Float |
| Shifter | Shimano SLX | SRAM GX |
| Derailleur | Shimano SLX | SRAM GX Eagle |
| Cassette | Shimano SLX | SRAM GX Eagle |
| Chain | Shimano SLX | SRAM NX Eagle |
| Crankset | Shimano SLX | SRAM X1 Eagle |
| Chainring | Shimano SLX M7120 | Chainring |
| Bottom bracket | Shimano MT801 | SRAM DUB |
| Wheelset | Specialized hookless alloy | Specialized 29 Disc |
| Tire | Specialized Butcher, Specialized Eliminator | Specialized Butcher, Specialized Eliminator |
| Brake | TRP EVO | SRAM Code RS |
| Handlebar | Specialized 6000 series | Specialized alloy |
| Stem | Specialized Trail | Specialized Alloy |
| Grips | Specialized Trail Grips | not listed |
| Dropper post | X-Fusion Manic | X-Fusion Manic |
| Seatpost | X-Fusion Manic | X-Fusion Manic |
| Saddle | Specialized Bridge Comp | Specialized Bridge |
| Headset | not listed | FSA |
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