2018 Trek Stache AL Frameset vs 2020 Specialized Fuse M4
The L is the Specialized Fuse M4 size closest to your L Trek Stache AL Frameset. 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 Trek Stache AL Frameset in L, the Specialized Fuse M4 in L places the top of the head tube 5 mm lower and 15 mm further forward, relative to the bottom bracket. Its wheelbase is 39 mm longer, which can contribute to stability at speed.
- Frame stack
- −5 mm
- Lower front end
- Frame reach
- +15 mm
- Longer frame reach
- Wheelbase
- +39 mm
- Longer: steadier at speed
- Head angle
- −1.3°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Trek Stache AL Frameset is drawn. The Specialized Fuse M4 numbers we have for size L are missing the chainstay length.
Geometry side by side
| Measurement | Trek Stache AL Frameset L | Specialized Fuse M4 L | Difference |
|---|---|---|---|
| Reach | 445 | 460mm | +15 mm |
| Stack | 644 | 639mm | −5 mm |
| Head tube angle | 67.8° | 66.5° | −1.3° |
| Seat tube angle | 73.5° | 74° | +0.5° |
| Effective top tube | 643 | not listed | |
| Chainstay length | 420 | not listed | |
| Wheelbase | 1149 | 1188mm | +39 mm |
| BB drop | 65 | not listed | |
| BB height | 322 | not listed | |
| Standover | 782 | 754mm | −28 mm |
| Seat tube length | 470 | 455mm | −15 mm |
| Head tube length | 100 | 110mm | +10 mm |
| Fork length | not listed | 540mm |
Differences are the Specialized Fuse M4 minus the Trek Stache AL Frameset. Full charts: 2018 Trek Stache AL Frameset, 2020 Specialized Fuse M4.
Where each sits in its class
Trek Stache AL FramesetSpecialized 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 | Trek Stache AL FramesetAL Frameset | Specialized Fuse M4 |
|---|---|---|
| Frame | Trek Alpha Platinum | not listed |
| Headset | FSA IS2 | not listed |
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