Cervélo's lightweight climber and aero race bike compared head-to-head. Both are WorldTour-proven race platforms with very different priorities.
$5,500 - $14,000
Best for: Climbing, GC racing and hilly endurance
$6,000 - $15,000
Best for: Flat racing, sprints and breakaways
| Aspect | Cervélo R5 | Cervélo S5 |
|---|---|---|
| Stack (56cm) | ~567mm | ~558mm |
| Reach (56cm) | ~390mm | ~397mm |
| Head Tube Angle | 73.0° | 73.0° |
| Max Tire Clearance | 34mm | 34mm |
| Climbing | Excellent ✓ | Very good |
| Aero on Flats | Good | Excellent ✓ |
| Cockpit Adjustability | Standard | V-Stem split design ✓ |
Cervélo uses numeric sizing (48-61cm) consistent across the R5 and S5 - your nominal size is the same on both bikes. The S5 sits a touch lower in stack and slightly longer in reach than the R5 at the same nominal size, so the position is more aggressive even before you account for the deep aero bars. Riders who already run a slammed stem on the R5 will find the S5 fits naturally; riders at the limit of their drop should consider sizing down on the S5 or staying with the R5. The V-Stem cockpit on the S5 gives some adjustability, but core stack and reach are dictated by the frame.
Choose the R5 if you ride hilly terrain, race GC-style events or want the lightest pure-climbing Cervélo. Choose the S5 if you race flat criteriums, sprint-finish road races or spend most of your time above 35km/h where aero matters more than weight.
Cervélo R5 - slightly taller stack and lighter ride feel
Tie - R5 wins on climbs, S5 wins on flats