2018 Specialized Stumpjumper Men's Comp Alloy 29 vs 2020 Specialized Fuse M4
The XL is the Specialized Fuse M4 size closest to your XL Specialized Stumpjumper Men's Comp Alloy 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 Comp Alloy 29 in XL, the Specialized Fuse M4 in XL places the top of the head tube 4 mm lower and 10 mm further forward, relative to the bottom bracket. Its wheelbase is 18 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −4 mm
- Lower front end
- Frame reach
- +10 mm
- Longer frame reach
- Wheelbase
- −18 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 Comp Alloy 29 is drawn. The Specialized Fuse M4 numbers we have for size XL are missing the chainstay length.
Geometry side by side
| Measurement | Specialized Stumpjumper Men's Comp Alloy 29 XL | Specialized Fuse M4 XL | Difference |
|---|---|---|---|
| Reach | 470mm | 480mm | +10 mm |
| Stack | 656mm | 652mm | −4 mm |
| Head tube angle | 66.5° | 66.5° | ±0.0° |
| Seat tube angle | 73.7° | 74° | +0.3° |
| Effective top tube | 662mm | not listed | |
| Chainstay length | 437mm | not listed | |
| Wheelbase | 1232mm | 1214mm | −18 mm |
| BB drop | 33mm | not listed | |
| BB height | 341mm | not listed | |
| Standover | 776mm | 793mm | +17 mm |
| Seat tube length | 505mm | 505mm | ±0 mm |
| Fork length | 560mm | 540mm | −20 mm |
| Head tube length | 140mm | 125mm | −15 mm |
Differences are the Specialized Fuse M4 minus the Specialized Stumpjumper Men's Comp Alloy 29. Full charts: 2018 Specialized Stumpjumper Men's Comp Alloy 29, 2020 Specialized Fuse M4.
Where each sits in its class
Specialized Stumpjumper Men's Comp Alloy 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 Comp Alloy 29Men's Comp Alloy 29 | Specialized Fuse M4 |
|---|---|---|
| Fork | Fox FLOAT 34 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 29 | 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 Phenom Comp | not listed |
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