2020 Specialized Stumpjumper Expert Carbon 27.5 vs 2020 Specialized Stumpjumper ST Alloy 27.5
The XL is the Specialized Stumpjumper ST Alloy 27.5 size closest to your XL Specialized Stumpjumper Expert Carbon 27.5. 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 ST Alloy 27.5
Compared with the Specialized Stumpjumper Expert Carbon 27.5 in XL, the Specialized Stumpjumper ST Alloy 27.5 in XL places the top of the head tube at about the same height and about as far forward, relative to the bottom bracket.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- ±0 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Stumpjumper Expert Carbon 27.5, XLSpecialized Stumpjumper ST Alloy 27.5, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper Expert Carbon 27.5 XL | Specialized Stumpjumper ST Alloy 27.5 XL | Difference |
|---|---|---|---|
| Reach | 480mm | 480mm | ±0 mm |
| Stack | 637mm | 637mm | ±0 mm |
| Head tube angle | 65.5° | 65.5° | ±0.0° |
| Seat tube angle | 74.2° | 74.2° | ±0.0° |
| Chainstay length | 432mm | 432mm | ±0 mm |
| Wheelbase | 1243mm | 1243mm | ±0 mm |
| BB drop | 21mm | 21mm | ±0 mm |
| BB height | 336mm | 336mm | ±0 mm |
| Standover | 774mm | 770mm | −4 mm |
| Seat tube length | 505mm | 505mm | ±0 mm |
| Fork length | 542mm | 542mm | ±0 mm |
| Head tube length | 155mm | 155mm | ±0 mm |
Differences are the Specialized Stumpjumper ST Alloy 27.5 minus the Specialized Stumpjumper Expert Carbon 27.5. Full charts: 2020 Specialized Stumpjumper Expert Carbon 27.5, 2020 Specialized Stumpjumper ST Alloy 27.5.
Where each sits in its class
Specialized Stumpjumper Expert Carbon 27.5Specialized Stumpjumper ST Alloy 27.5
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 Expert Carbon 27.5Expert Carbon 27.5 | Specialized Stumpjumper ST Alloy 27.5 |
|---|---|---|
| Fork | Fox FLOAT Rhythm | not listed |
| Rear shock | Fox Float DPX2 Performance | not listed |
| Shifter | SRAM GX Eagle | not listed |
| Derailleur | SRAM GX Eagle | not listed |
| Cassette | SRAM GX Eagle | not listed |
| Chain | SRAM GX Eagle | not listed |
| Crankset | SRAM Descendant | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Pedals | Specialized PROVIDED BY | not listed |
| Tire | Specialized Butcher, Specialized Eliminator | not listed |
| Hub | DT Swiss 370 | not listed |
| Rim | Roval Traverse | not listed |
| Brake | SRAM Code | not listed |
| Grips | Specialized Deity | not listed |
| Seatpost | X-Fusion Manic | not listed |
| Saddle | Specialized Bridge 155 S2 | not listed |
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