2021 Specialized Allez Sport vs 2023 Specialized Roubaix SL8 Comp
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Specialized Roubaix SL8 Comp
- Frame stack
- +9 mm
- Higher front end
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- +13 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Specialized Allez Sport numbers we have for size 56 are missing the reach and seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Specialized Allez Sport 56 | Specialized Roubaix SL8 Comp 56 | Difference |
|---|---|---|---|
| Reach | not listed | 389 | |
| Stack | 596mm | 605 | +9 mm |
| Head tube angle | 73.5° | 73 | −0.5° |
| Seat tube angle | not listed | 73.5 | |
| Chainstay length | 420mm | 420 | ±0 mm |
| Wheelbase | 999mm | 1012 | +13 mm |
| Standover | 785mm | 787 | +2 mm |
| Seat tube length | 530mm | 485 | −45 mm |
| Fork length | 368mm | not listed | |
| Head tube length | 180mm | 140 | −40 mm |
| Effective top tube | not listed | 569 | |
| BB height | not listed | 270 |
Differences are the Specialized Roubaix SL8 Comp minus the Specialized Allez Sport. Full charts: 2021 Specialized Allez Sport, 2023 Specialized Roubaix SL8 Comp.
Where each sits in its class
Specialized Allez SportSpecialized Roubaix SL8 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 Allez SportSport | Specialized Roubaix SL8 CompSL8 Comp |
|---|---|---|
| Frame | Specialized Allez | Specialized FACT 10R |
| Fork | Specialized FACT | Specialized Future Shock 3.2 |
| Shifter | Shimano Sora | Shimano 105 |
| Derailleur | Shimano Sora | Shimano 105 |
| Chain | KMC X9 | Shimano 105 |
| Crankset | Praxis Alba | Shimano 105 |
| Chainring | Praxis Alba | Shimano 105 |
| Wheelset | Specialized Axis Sport | DT Swiss G540 |
| Tire | Specialized Roadsport | S Works Mondo, S Works Mondo 2BR |
| Brake | Specialized Axis 1.0 | Shimano 105 |
| Handlebar | Specialized Shallow Drop | Specialized Hover |
| Saddle | Specialized Bridge Saddle | Specialized Body Geometry Power Sport |
| Cassette | not listed | Shimano 105 |
| Bottom bracket | not listed | Shimano 105 |
| Rotor | not listed | Shimano 105 |
| Stem | not listed | Specialized Future Stem |
| Bar tape | not listed | Supacaz Super Sticky Kush |
| Seatpost | not listed | Specialized S-Works Pavé |
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