2021 Specialized Roubaix vs 2019 Specialized Allez Sport
The 54 is the Specialized Allez Sport size closest to your 52 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 52, the Specialized Allez Sport in 54 places the top of the head tube at about the same height and 12 mm further forward, relative to the bottom bracket.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- +12 mm
- Longer frame reach
- Wheelbase
- +2 mm
- About the same
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- +2 mm
- About the same
The two frames
Specialized Roubaix, 52Specialized Allez Sport, 54Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix 52 | Specialized Allez Sport 54 | Difference |
|---|---|---|---|
| Reach | 368mm | 380mm | +12 mm |
| Stack | 570mm | 570mm | ±0 mm |
| Head tube angle | 72° | 73° | +1.0° |
| Seat tube angle | 74° | 73.25° | −0.8° |
| Chainstay length | 413mm | 415mm | +2 mm |
| Wheelbase | 986mm | 988mm | +2 mm |
| BB drop | 77.5mm | 76mm | −2 mm |
| BB height | 265mm | 264mm | −1 mm |
| Standover | 743mm | 775mm | +32 mm |
| Seat tube length | 446mm | 510mm | +64 mm |
| Fork length | 370mm | 375mm | +5 mm |
| Head tube length | 112mm | 155mm | +43 mm |
| Effective top tube | not listed | 552mm |
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 |
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