2018 Specialized Stumpjumper Expert 27.5 vs 2020 Specialized Fuse M4
The M is the Specialized Fuse M4 size closest to your L Specialized Stumpjumper Expert 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 Fuse M4
Compared with the Specialized Stumpjumper Expert 27.5 in L, the Specialized Fuse M4 in M places the top of the head tube 17 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 4 mm longer, which can contribute to stability at speed.
- Frame stack
- +17 mm
- Higher front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- +4 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Specialized Stumpjumper Expert 27.5 is drawn. The Specialized Fuse M4 numbers we have for size M are missing the chainstay length.
Geometry side by side
| Measurement | Specialized Stumpjumper Expert 27.5 L | Specialized Fuse M4 M | Difference |
|---|---|---|---|
| Reach | 442mm | 440mm | −2 mm |
| Stack | 608mm | 625mm | +17 mm |
| Head tube angle | 67° | 66.5° | −0.5° |
| Seat tube angle | 74° | 74° | ±0.0° |
| Effective top tube | 618mm | not listed | |
| Chainstay length | 420mm | not listed | |
| Wheelbase | 1158mm | 1162mm | +4 mm |
| BB drop | 18mm | not listed | |
| Standover | 762mm | 750mm | −12 mm |
| Seat tube length | 468mm | 410mm | −58 mm |
| Fork length | 542mm | 540mm | −2 mm |
| Head tube length | 125mm | 95mm | −30 mm |
Differences are the Specialized Fuse M4 minus the Specialized Stumpjumper Expert 27.5. Full charts: 2018 Specialized Stumpjumper Expert 27.5, 2020 Specialized Fuse M4.
Where each sits in its class
Specialized Stumpjumper Expert 27.5Specialized Fuse M4
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 27.5Expert 27.5 | Specialized Fuse M4 |
|---|---|---|
| Fork | Fox 27.5 Performance | not listed |
| Rear shock | RockShox Monarch RT3 | 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 | TruVativ Descendant | not listed |
| Tire | Specialized Butcher | not listed |
| Rim | Roval Traverse | not listed |
| Brake | SRAM Guide R | not listed |
| Grips | Specialized Sip Grip | not listed |
| Seatpost | Specialized Command Post IRcc | not listed |
| Saddle | Specialized Henge Comp | not listed |
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