2017 Specialized Roubaix SL4 vs 2019 Cannondale Synapse Disc Women’s Tiagra
The 51 is the Cannondale Synapse Disc Women’s Tiagra size closest to your 49 Specialized Roubaix SL4. 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 Cannondale Synapse Disc Women’s Tiagra
Compared with the Specialized Roubaix SL4 in 49, the Cannondale Synapse Disc Women’s Tiagra in 51 places the top of the head tube 22 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 11 mm longer, which can contribute to stability at speed.
- Frame stack
- +22 mm
- Higher front end
- Frame reach
- −1 mm
- About the same reach
- Wheelbase
- +11 mm
- Longer: steadier at speed
- Head angle
- −0.3°
- About the same head angle
- Chainstays
- +1 mm
- About the same
The two frames
Specialized Roubaix SL4, 49Cannondale Synapse Disc Women’s Tiagra, 51Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL4 49 | Cannondale Synapse Disc Women’s Tiagra 51 | Difference |
|---|---|---|---|
| Reach | 378mm | 377 | −1 mm |
| Stack | 528mm | 550 | +22 mm |
| Head tube angle | 72° | 71.7 | −0.3° |
| Seat tube angle | 75.5° | 74.3 | −1.2° |
| Effective top tube | 514mm | 531 | +17 mm |
| Chainstay length | 412mm | 413 | +1 mm |
| Wheelbase | 983mm | 994 | +11 mm |
| BB drop | 73mm | 75 | +2 mm |
| BB height | 269.5mm | 270 | +1 mm |
| Standover | 730mm | 742 | +12 mm |
| Seat tube length | 445mm | 443 | −2 mm |
| Fork length | 368mm | not listed | |
| Head tube length | 125mm | 143 | +18 mm |
Differences are the Cannondale Synapse Disc Women’s Tiagra minus the Specialized Roubaix SL4. Full charts: 2017 Specialized Roubaix SL4, 2019 Cannondale Synapse Disc Women’s Tiagra.
Where each sits in its class
Specialized Roubaix SL4Cannondale Synapse Disc Women’s Tiagra
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 SL4SL4 | Cannondale Synapse Disc Women’s TiagraDisc Women’s Tiagra |
|---|---|---|
| Frame | Specialized SL4 FACT | Cannondale Synapse |
| Shifter | Shimano Tiagra | Shimano Tiagra |
| Derailleur | Shimano Tiagra | Shimano Tiagra, Shimano Tiagra GS |
| Cassette | Shimano Tiagra | not listed |
| Chain | KMC X-10 | KMC X10EL |
| Crankset | Praxis Alba | FSA Omega |
| Wheelset | Specialized AXIS Elite | not listed |
| Tire | Specialized Espoir Elite | Vittoria Zaffiro |
| Brake | Specialized Axis 1.0 | Promax DSK 718R, Shimano Tiagra |
| Seatpost | Specialized CG-R | Cannondale C4 |
| Saddle | Specialized Toupé Sport | Cannondale Stage |
| Fork | not listed | Synapse |
| Hub | not listed | Formula RX-512 |
| Rim | not listed | RD 3.0 |
| Handlebar | not listed | Cannondale C4 |
| Stem | not listed | Cannondale C4 |
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
