2021 Specialized Roubaix vs 2019 Specialized Allez Sport
The 56 is the Specialized Allez Sport size closest to your 56 Specialized Roubaix. 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 in 56, the Specialized Allez Sport in 56 places the top of the head tube 9 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- +1 mm
- About the same reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Roubaix, 56Specialized Allez Sport, 56Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix 56 | Specialized Allez Sport 56 | Difference |
|---|---|---|---|
| Reach | 384mm | 385mm | +1 mm |
| Stack | 605mm | 596mm | −9 mm |
| Head tube angle | 73.5° | 73.5° | ±0.0° |
| Seat tube angle | 73.5° | 73.25° | −0.3° |
| Chainstay length | 415mm | 415mm | ±0 mm |
| Wheelbase | 995mm | 996mm | +1 mm |
| BB drop | 76mm | 76mm | ±0 mm |
| BB height | 266mm | 264mm | −2 mm |
| Standover | 783mm | 795mm | +12 mm |
| Seat tube length | 485mm | 530mm | +45 mm |
| Fork length | 370mm | 375mm | +5 mm |
| Head tube length | 143mm | 180mm | +37 mm |
| Effective top tube | not listed | 564mm |
Differences are the Specialized Allez Sport minus the Specialized Roubaix. Full charts: 2021 Specialized Roubaix, 2019 Specialized Allez Sport.
Where each sits in its class
Specialized RoubaixSpecialized 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 RoubaixRoubaix | Specialized Allez SportSport |
|---|---|---|
| Fork | Specialized Future Shock 1.5 | not listed |
| Shifter | Shimano Tiagra | Shimano Sora |
| Derailleur | Shimano Tiagra | Shimano Sora |
| Cassette | Shimano Tiagra | not listed |
| Chain | KMC X10 | KMC X9 |
| Crankset | Praxis Alba | Praxis Alba M30 |
| Wheelset | Specialized AXIS Elite | Specialized Axis Sport |
| Tire | Specialized Espoir Sport | Specialized Espoir Sport |
| Handlebar | Specialized Hover | not listed |
| Stem | Specialized Future | not listed |
| Seatpost | Specialized S-Works Pave | not listed |
| Saddle | Specialized Power Sport | Specialized Toupé Sport |
| Brake | not listed | Specialized Axis 1.0 |
Know what is on every bike.
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