2021 Specialized Roubaix Sagan Collection vs 2019 Specialized Allez Sport
The 54 is the Specialized Allez Sport size closest to your 52 Specialized Roubaix Sagan Collection. 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 Sagan Collection 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 Sagan Collection, 52Specialized Allez Sport, 54Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix Sagan Collection 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 Sagan Collection. Full charts: 2021 Specialized Roubaix Sagan Collection, 2019 Specialized Allez Sport.
Where each sits in its class
Specialized Roubaix Sagan CollectionSpecialized 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 Sagan CollectionS-Works Sagan Collection | Specialized Allez SportSport |
|---|---|---|
| Fork | Specialized Future Shock 2.0 | not listed |
| Shifter | Shimano Dura-Ace Di2 | Shimano Sora |
| Derailleur | Shimano Dura-Ace R9150 Di2, Shimano Dura-Ace R9100 | Shimano Sora |
| Cassette | Shimano Dura-Ace R9100 | not listed |
| Chain | Shimano Dura-Ace | KMC X9 |
| Crankset | Shimano Dura-Ace R9100 | Praxis Alba M30 |
| Wheelset | Roval Rapide CLX | Specialized Axis Sport |
| Tire | Specialized Turbo Cotton | Specialized Espoir Sport |
| Brake | Shimano Dura-Ace | Specialized Axis 1.0 |
| Stem | Specialized S-Works Future | not listed |
| Seatpost | Specialized S-Works Pave | not listed |
| Saddle | Specialized S-Works Romin Evo | Specialized Toupé Sport |
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