2018 Specialized Roubaix Expert UDi2 vs 2019 Specialized Allez Sport
The 56 is the Specialized Allez Sport size closest to your 56 Specialized Roubaix Expert UDi2. 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 Expert UDi2 in 56, the Specialized Allez Sport in 56 places the top of the head tube 15 mm lower and 4 mm further forward, relative to the bottom bracket. Its wheelbase is 3 mm longer, which can contribute to stability at speed.
- Frame stack
- −15 mm
- Lower front end
- Frame reach
- +4 mm
- Longer frame reach
- Wheelbase
- +3 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Roubaix Expert UDi2, 56Specialized Allez Sport, 56Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix Expert UDi2 56 | Specialized Allez Sport 56 | Difference |
|---|---|---|---|
| Reach | 381mm | 385mm | +4 mm |
| Stack | 611mm | 596mm | −15 mm |
| Head tube angle | 73.5° | 73.5° | ±0.0° |
| Seat tube angle | 73.5° | 73.25° | −0.3° |
| Effective top tube | 561.8mm | 564mm | +2 mm |
| Chainstay length | 415mm | 415mm | ±0 mm |
| Wheelbase | 993mm | 996mm | +3 mm |
| BB drop | 76mm | 76mm | ±0 mm |
| Standover | 785mm | 795mm | +10 mm |
| Seat tube length | 501mm | 530mm | +29 mm |
| Head tube length | 150mm | 180mm | +30 mm |
| BB height | not listed | 264mm | |
| Fork length | not listed | 375mm |
Differences are the Specialized Allez Sport minus the Specialized Roubaix Expert UDi2. Full charts: 2018 Specialized Roubaix Expert UDi2, 2019 Specialized Allez Sport.
Where each sits in its class
Specialized Roubaix Expert UDi2Specialized 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 Expert UDi2Expert UDi2 | Specialized Allez SportSport |
|---|---|---|
| Shifter | Shimano 105 R785 Di2 | Shimano Sora |
| Derailleur | Shimano Ultegra Di2, Shimano Ultegra Di2 GS | Shimano Sora |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano Ultegra | KMC X9 |
| Crankset | Shimano Ultegra | Praxis Alba M30 |
| Wheelset | DT Swiss R460 | Specialized Axis Sport |
| Tire | Specialized Turbo Pro | Specialized Espoir Sport |
| Brake | Shimano RS805 | Specialized Axis 1.0 |
| Handlebar | Specialized Comp Hover | not listed |
| Seatpost | Specialized CG-R | not listed |
| Saddle | Specialized Phenom Expert | Specialized Toupé Sport |
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