2018 Specialized Stumpjumper Men's Expert 29 vs 2020 Specialized Fuse M4
The S is the Specialized Fuse M4 size closest to your M Specialized Stumpjumper Men's Expert 29. 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 Men's Expert 29 in M, the Specialized Fuse M4 in S places the top of the head tube 11 mm higher and 5 mm further back, relative to the bottom bracket. Its wheelbase is 27 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +11 mm
- Higher front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −27 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Specialized Stumpjumper Men's Expert 29 is drawn. The Specialized Fuse M4 numbers we have for size S are missing the chainstay length.
Geometry side by side
| Measurement | Specialized Stumpjumper Men's Expert 29 M | Specialized Fuse M4 S | Difference |
|---|---|---|---|
| Reach | 425mm | 420mm | −5 mm |
| Stack | 614mm | 625mm | +11 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 74.5° | 74° | −0.5° |
| Effective top tube | 595mm | not listed | |
| Chainstay length | 437mm | not listed | |
| Wheelbase | 1169mm | 1142mm | −27 mm |
| BB drop | 33mm | not listed | |
| BB height | 342mm | not listed | |
| Standover | 750mm | 747mm | −3 mm |
| Seat tube length | 410mm | 375mm | −35 mm |
| Fork length | 560mm | 540mm | −20 mm |
| Head tube length | 95mm | 95mm | ±0 mm |
Differences are the Specialized Fuse M4 minus the Specialized Stumpjumper Men's Expert 29. Full charts: 2018 Specialized Stumpjumper Men's Expert 29, 2020 Specialized Fuse M4.
Where each sits in its class
Specialized Stumpjumper Men's Expert 29Specialized 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 Men's Expert 29Men's Expert 29 | Specialized Fuse M4 |
|---|---|---|
| Fork | RockShox Pike RC | not listed |
| Rear shock | RockShox Deluxe 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, Specialized Purgatory | 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 Phenom Comp | not listed |
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