2018 Specialized Stumpjumper Women's Comp Carbon 27.5 vs 2020 Specialized Stumpjumper ST Alloy 27.5
The Specialized Stumpjumper ST Alloy 27.5 size closest to your S is the S. Compare the S instead
What changes on the Specialized Stumpjumper ST Alloy 27.5
Compared with the Specialized Stumpjumper Women's Comp Carbon 27.5 in S, the Specialized Stumpjumper ST Alloy 27.5 in XL places the top of the head tube 45 mm higher and 65 mm further forward, relative to the bottom bracket. Its wheelbase is 86 mm longer, which can contribute to stability at speed.
- Frame stack
- +45 mm
- Higher front end
- Frame reach
- +65 mm
- Longer frame reach
- Wheelbase
- +86 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Stumpjumper Women's Comp Carbon 27.5, SSpecialized Stumpjumper ST Alloy 27.5, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper Women's Comp Carbon 27.5 S | Specialized Stumpjumper ST Alloy 27.5 XL | Difference |
|---|---|---|---|
| Reach | 415mm | 480mm | +65 mm |
| Stack | 592mm | 637mm | +45 mm |
| Head tube angle | 65.5° | 65.5° | ±0.0° |
| Seat tube angle | 75.3° | 74.2° | −1.1° |
| Effective top tube | 570mm | not listed | |
| Chainstay length | 432mm | 432mm | ±0 mm |
| Wheelbase | 1157mm | 1243mm | +86 mm |
| BB drop | 21mm | 21mm | ±0 mm |
| BB height | 336mm | 336mm | ±0 mm |
| Standover | 739mm | 770mm | +31 mm |
| Seat tube length | 380mm | 505mm | +125 mm |
| Fork length | 542mm | 542mm | ±0 mm |
| Head tube length | 105mm | 155mm | +50 mm |
Differences are the Specialized Stumpjumper ST Alloy 27.5 minus the Specialized Stumpjumper Women's Comp Carbon 27.5. Full charts: 2018 Specialized Stumpjumper Women's Comp Carbon 27.5, 2020 Specialized Stumpjumper ST Alloy 27.5.
Where each sits in its class
Specialized Stumpjumper Women's Comp 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 Women's Comp Carbon 27.5Women's Comp Carbon 27.5 | Specialized Stumpjumper ST Alloy 27.5 |
|---|---|---|
| Fork | Fox Float Rhythm | not listed |
| Rear shock | Fox Float DPS Performance | not listed |
| Shifter | Shimano SLX | not listed |
| Derailleur | Shimano XT | not listed |
| Cassette | Shimano SLX | not listed |
| Chain | KMC X-11 | not listed |
| Crankset | Race Face Aeffect | not listed |
| Tire | Specialized Butcher, Specialized Purgatory | not listed |
| Rim | Roval Traverse 27.5 | not listed |
| Brake | Shimano SLX | not listed |
| Grips | Specialized Sip Grip | not listed |
| Dropper post | X-Fusion Manic | not listed |
| Seatpost | X-Fusion Manic | not listed |
| Saddle | Specialized Myth Sport | not listed |
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