2020 Specialized Roubaix Comp Shimano vs 2019 Specialized Allez Sport
The 54 is the Specialized Allez Sport size closest to your 52 Specialized Roubaix Comp Shimano. 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 Shimano 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 Comp Shimano, 52Specialized Allez Sport, 54Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix Comp Shimano 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 Comp Shimano. Full charts: 2020 Specialized Roubaix Comp Shimano, 2019 Specialized Allez Sport.
Where each sits in its class
Specialized Roubaix Comp ShimanoSpecialized 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 Comp Shimano | Specialized Allez SportSport |
|---|---|---|
| Shifter | not listed | Shimano Sora |
| Derailleur | not listed | Shimano Sora |
| Chain | not listed | KMC X9 |
| Crankset | not listed | Praxis Alba M30 |
| Wheelset | not listed | Specialized Axis Sport |
| Tire | not listed | Specialized Espoir Sport |
| Brake | not listed | Specialized Axis 1.0 |
| Saddle | not listed | Specialized Toupé Sport |
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