2026 Cervélo R5 vs 2026 Specialized Tarmac SL8 Pro Shimano
The 49 is the Specialized Tarmac SL8 Pro Shimano size closest to your 51 Cervélo R5. 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 Tarmac SL8 Pro Shimano
Compared with the Cervélo R5 in 51, the Specialized Tarmac SL8 Pro Shimano in 49 places the top of the head tube 6 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 5 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- −5 mm
- Shorter: quicker to change direction
- Head angle
- n/a
- One of the bikes has no number for this
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Cervélo R5 is drawn. The Specialized Tarmac SL8 Pro Shimano numbers we have for size 49 are missing the head angle.
Geometry side by side
| Measurement | Cervélo R5 51 | Specialized Tarmac SL8 Pro Shimano 49 | Difference |
|---|---|---|---|
| Reach | 376.5 | 375 | −2 mm |
| Stack | 520.2 | 514 | −6 mm |
| Head tube angle | 72 | not listed | |
| Seat tube angle | 74 | 75.5 | +1.5° |
| Effective top tube | 526 | not listed | |
| Chainstay length | 410 | 410 | ±0 mm |
| Wheelbase | 977.6 | 973 | −5 mm |
| BB drop | 76.5 | not listed | |
| Head tube length | 109.3 | 109 | −0 mm |
Differences are the Specialized Tarmac SL8 Pro Shimano minus the Cervélo R5. Full charts: 2026 Cervélo R5, 2026 Specialized Tarmac SL8 Pro Shimano.
Where each sits in its class
Cervélo R5Specialized Tarmac SL8 Pro Shimano
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 | Cervélo R5Dura-Ace Di2 | Specialized Tarmac SL8 Pro ShimanoPro - Shimano Ultegra Di2 |
|---|---|---|
| Frame | Cervélo R5 | Specialized Tarmac SL8 |
| Shifter | Shimano Dura-Ace Di2 | Shimano Ultegra R8170 |
| Derailleur | Shimano Dura-Ace Di2 | Shimano Ultegra R8150 Di2 |
| Cassette | Shimano Dura-Ace 11-34T | Shimano Ultegra |
| Crankset | Shimano Dura-Ace Di2 | Shimano Ultegra R81000 |
| Wheelset | Reserve 34|37TA ST | Roval Rapide CL III |
| Tire | Vittoria Corsa Speed | Specialized S-Works Turbo |
| Brake | Shimano Dura-Ace Di2 | Shimano Ultegra R8170 |
| Handlebar | Cervélo HB18 | Roval Rapide Cockpit |
| Stem | Cervélo HB18 | Roval Rapide Cockpit |
| Seatpost | Cervélo SP33 D-Shaped | Specialized S-Works Tarmac SL8 |
| Fork | not listed | Specialized FACT 10r |
| Chain | not listed | Shimano XT M8100 |
| Bottom bracket | not listed | Shimano Threaded BSA |
| Rotor | not listed | Shimano Ultegra R8170 |
| Bar tape | not listed | Supacaz Super Sticky Kush |
| Saddle | not listed | Specialized Power Pro |
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