2021 Specialized Roubaix Comp vs 2019 Specialized Allez Sport
The 56 is the Specialized Allez Sport size closest to your 54 Specialized Roubaix Comp. 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 Allez Sport
Compared with the Specialized Roubaix Comp in 54, the Specialized Allez Sport in 56 places the top of the head tube 11 mm higher and 9 mm further forward, relative to the bottom bracket. Its wheelbase is 8 mm longer, which can contribute to stability at speed.
- Frame stack
- +11 mm
- Higher front end
- Frame reach
- +9 mm
- Longer frame reach
- Wheelbase
- +8 mm
- Longer: steadier at speed
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Roubaix Comp, 54Specialized Allez Sport, 56Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix Comp 54 | Specialized Allez Sport 56 | Difference |
|---|---|---|---|
| Reach | 376mm | 385mm | +9 mm |
| Stack | 585mm | 596mm | +11 mm |
| Head tube angle | 72.75° | 73.5° | +0.8° |
| Seat tube angle | 74° | 73.25° | −0.8° |
| Chainstay length | 415mm | 415mm | ±0 mm |
| Wheelbase | 988mm | 996mm | +8 mm |
| BB drop | 76mm | 76mm | ±0 mm |
| BB height | 266mm | 264mm | −2 mm |
| Standover | 762mm | 795mm | +33 mm |
| Seat tube length | 465mm | 530mm | +65 mm |
| Fork length | 370mm | 375mm | +5 mm |
| Head tube length | 125mm | 180mm | +55 mm |
| Effective top tube | not listed | 564mm |
Differences are the Specialized Allez Sport minus the Specialized Roubaix Comp. Full charts: 2021 Specialized Roubaix Comp, 2019 Specialized Allez Sport.
Where each sits in its class
Specialized Roubaix CompSpecialized Allez Sport
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 Roubaix CompComp | Specialized Allez SportSport |
|---|---|---|
| Fork | Specialized Future Shock 1.5 | not listed |
| Shifter | Shimano Ultegra | Shimano Sora |
| Derailleur | Shimano Ultegra R8000, Shimano GRX RX800 | Shimano Sora |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano Ultegra | KMC X9 |
| Crankset | Shimano Ultegra R8000 | Praxis Alba M30 |
| Wheelset | DT Swiss R470 | Specialized Axis Sport |
| Tire | Specialized Turbo Pro | Specialized Espoir Sport |
| Brake | Shimano Ultegra R8070 | Specialized Axis 1.0 |
| Handlebar | Specialized Hover | not listed |
| Stem | Specialized Future | not listed |
| Seatpost | Specialized S-Works Pave | not listed |
| Saddle | Specialized Power | Specialized Toupé Sport |
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