2017 Specialized Roubaix Boonen vs 2019 Specialized Allez Sport
The 52 is the Specialized Allez Sport size closest to your 49 Specialized Roubaix Boonen. 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 Boonen in 49, the Specialized Allez Sport in 52 places the top of the head tube 3 mm higher and 7 mm further forward, relative to the bottom bracket. Its wheelbase is 3 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +3 mm
- Higher front end
- Frame reach
- +7 mm
- Longer frame reach
- Wheelbase
- −3 mm
- Shorter: quicker to change direction
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- +2 mm
- About the same
The two frames
Specialized Roubaix Boonen, 49Specialized Allez Sport, 52Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix Boonen 49 | Specialized Allez Sport 52 | Difference |
|---|---|---|---|
| Reach | 369mm | 376mm | +7 mm |
| Stack | 549mm | 552mm | +3 mm |
| Head tube angle | 72° | 73° | +1.0° |
| Seat tube angle | 74° | 73.25° | −0.8° |
| Effective top tube | 527mm | 542mm | +15 mm |
| Chainstay length | 413mm | 415mm | +2 mm |
| Wheelbase | 981mm | 978mm | −3 mm |
| BB drop | 77.5mm | 77mm | −1 mm |
| Standover | 715.5mm | 755mm | +40 mm |
| Seat tube length | 425mm | 490mm | +65 mm |
| Head tube length | 90mm | 135mm | +45 mm |
| BB height | not listed | 263mm | |
| Fork length | not listed | 375mm |
Differences are the Specialized Allez Sport minus the Specialized Roubaix Boonen. Full charts: 2017 Specialized Roubaix Boonen, 2019 Specialized Allez Sport.
Where each sits in its class
Specialized Roubaix BoonenSpecialized 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 BoonenS-Works Boonen | Specialized Allez SportSport |
|---|---|---|
| Seatpost | Specialized CG-R | not listed |
| 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 |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
