2018 Specialized Stumpjumper Comp Alloy 27.5 vs 2017 Specialized Stumpjumper FSR 650b
The S is the Specialized Stumpjumper FSR 650b size closest to your S Specialized Stumpjumper Comp Alloy 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 FSR 650b
Compared with the Specialized Stumpjumper Comp Alloy 27.5 in S, the Specialized Stumpjumper FSR 650b in S 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 Comp Alloy 27.5, SSpecialized Stumpjumper FSR 650b, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Stumpjumper Comp Alloy 27.5 S | Specialized Stumpjumper FSR 650b S | Difference |
|---|---|---|---|
| Reach | 388mm | 388mm | ±0 mm |
| Stack | 590mm | 590mm | ±0 mm |
| Head tube angle | 67° | 67° | ±0.0° |
| Seat tube angle | 74° | 74° | ±0.0° |
| Effective top tube | 553mm | 558mm | +5 mm |
| Chainstay length | 420mm | 420mm | ±0 mm |
| Wheelbase | 1096mm | 1096mm | ±0 mm |
| BB drop | 18mm | 18mm | ±0 mm |
| Standover | 742mm | 742mm | ±0 mm |
| Seat tube length | 396mm | 396mm | ±0 mm |
| Fork length | 542mm | 542mm | ±0 mm |
| Head tube length | 105mm | 95mm | −10 mm |
Differences are the Specialized Stumpjumper FSR 650b minus the Specialized Stumpjumper Comp Alloy 27.5. Full charts: 2018 Specialized Stumpjumper Comp Alloy 27.5, 2017 Specialized Stumpjumper FSR 650b.
Where each sits in its class
Specialized Stumpjumper Comp Alloy 27.5Specialized Stumpjumper FSR 650b
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 Comp Alloy 27.5Comp Alloy 27.5 | Specialized Stumpjumper FSR 650bS-Works 650b |
|---|---|---|
| Fork | Fox FLOAT 34 27.5 Rhythm | RockShox Pike RCT3 |
| Rear shock | RockShox Monarch RT | Öhlins STX |
| Shifter | SRAM GX | SRAM XX1 Eagle |
| Derailleur | SRAM GX | SRAM XX1 Eagle |
| Cassette | SRAM XG-1150 | SRAM X01 Eagle |
| Chain | KMC X-11 | SRAM XX1 Eagle |
| Crankset | Race Face Aeffect | SRAM XX1 Eagle |
| Tire | Specialized Butcher | Specialized Butcher, Specialized Slaughter |
| Hub | Specialized Stout Pro 110 | Roval Traverse, Roval Traverse SL |
| Rim | Roval Traverse 27.5 | Roval Traverse SL 650 |
| Brake | SRAM Guide R | SRAM Guide RS |
| Grips | Specialized Sip Grip | Specialized Sip Grip |
| Seatpost | Specialized Command Post IRcc | Specialized Command Post IRcc |
| Saddle | Specialized Henge Comp | Specialized Henge Expert |
| Stem | not listed | Syntace F109 |
| Dropper post | not listed | Specialized Command Post IRcc |
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