2017 Specialized Roubaix SL4 Sport vs 2019 Specialized Allez Sport
The 54 is the Specialized Allez Sport size closest to your 54 Specialized Roubaix SL4 Sport. 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 SL4 Sport in 54, the Specialized Allez Sport in 54 places the top of the head tube 6 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 12 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +6 mm
- Higher front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- −12 mm
- Shorter: quicker to change direction
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Roubaix SL4 Sport, 54Specialized Allez Sport, 54Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL4 Sport 54 | Specialized Allez Sport 54 | Difference |
|---|---|---|---|
| Reach | 380mm | 380mm | ±0 mm |
| Stack | 564mm | 570mm | +6 mm |
| Head tube angle | 72° | 73° | +1.0° |
| Seat tube angle | 73.5° | 73.25° | −0.3° |
| Effective top tube | 547mm | 552mm | +5 mm |
| Chainstay length | 415mm | 415mm | ±0 mm |
| Wheelbase | 1000mm | 988mm | −12 mm |
| BB drop | 71.5mm | 76mm | +5 mm |
| BB height | 271mm | 264mm | −7 mm |
| Standover | 776mm | 775mm | −1 mm |
| Seat tube length | 495mm | 510mm | +15 mm |
| Fork length | 368mm | 375mm | +7 mm |
| Head tube length | 165mm | 155mm | −10 mm |
Differences are the Specialized Allez Sport minus the Specialized Roubaix SL4 Sport. Full charts: 2017 Specialized Roubaix SL4 Sport, 2019 Specialized Allez Sport.
Where each sits in its class
Specialized Roubaix SL4 SportSpecialized 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 SL4 SportSL4 Sport | Specialized Allez SportSport |
|---|---|---|
| Frame | Specialized SL4 FACT | not listed |
| Shifter | Shimano 105 | Shimano Sora |
| Derailleur | Shimano 105 | Shimano Sora |
| Cassette | Shimano 105 | not listed |
| Chain | KMC X-11 | KMC X9 |
| Crankset | Praxis Alba | Praxis Alba M30 |
| Wheelset | Specialized AXIS Elite | Specialized Axis Sport |
| Tire | Specialized Turbo Pro | Specialized Espoir Sport |
| Brake | Specialized Axis 1.0 | Specialized Axis 1.0 |
| Seatpost | Specialized CG-R | not listed |
| Saddle | Specialized Phenom Comp GT | Specialized Toupé Sport |
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