2026 Specialized Tarmac SL8 vs 2025 Specialized Allez Sprint Comp
The Specialized Allez Sprint Comp size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Allez Sprint Comp
Compared with the Specialized Tarmac SL8 in 54, the Specialized Allez Sprint Comp in 58 places the top of the head tube 40 mm higher and 21 mm further forward, relative to the bottom bracket. Its wheelbase is 28 mm longer, which can contribute to stability at speed.
- Frame stack
- +40 mm
- Higher front end
- Frame reach
- +21 mm
- Longer frame reach
- Wheelbase
- +28 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Tarmac SL8, 54Specialized Allez Sprint Comp, 58Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac SL8 54 | Specialized Allez Sprint Comp 58 | Difference |
|---|---|---|---|
| Reach | 384mm | 405mm | +21 mm |
| Stack | 544mm | 584mm | +40 mm |
| Head tube angle | 73° | 73.5° | +0.5° |
| Seat tube angle | 74° | 73.5° | −0.5° |
| Effective top tube | 543 | 578mm | +35 mm |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 978mm | 1006mm | +28 mm |
| BB drop | 72mm | 72mm | ±0 mm |
| BB height | 268mm | 268mm | ±0 mm |
| Standover | 768mm | 815mm | +47 mm |
| Seat tube length | 473mm | 550mm | +77 mm |
| Fork length | 370mm | 366mm | −4 mm |
| Head tube length | 137mm | 180mm | +43 mm |
Differences are the Specialized Allez Sprint Comp minus the Specialized Tarmac SL8. Full charts: 2026 Specialized Tarmac SL8, 2025 Specialized Allez Sprint Comp.
Where each sits in its class
Specialized Tarmac SL8Specialized Allez Sprint Comp
Each bike is ranked against the other road 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 Tarmac SL8 | Specialized Allez Sprint CompComp |
|---|---|---|
| Shifter | not listed | Shimano 105 |
| Derailleur | not listed | Shimano 105 |
| Cassette | not listed | Shimano 105 |
| Chain | not listed | Shimano 105 |
| Crankset | not listed | Shimano 105 R7100 |
| Wheelset | not listed | DT Swiss R470 |
| Tire | not listed | Specialized Turbo Pro |
| Brake | not listed | Shimano 105 |
| Seatpost | not listed | Specialized S-Works Tarmac |
| Saddle | not listed | Specialized Power Sport |
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