2026 Cervélo R5 XPLR vs 2026 Specialized Tarmac SL8 Pro Shimano
The Specialized Tarmac SL8 Pro Shimano size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Tarmac SL8 Pro Shimano
Compared with the Cervélo R5 XPLR in 54, the Specialized Tarmac SL8 Pro Shimano in 58 places the top of the head tube 46 mm higher and 19 mm further forward, relative to the bottom bracket.
- Frame stack
- +46 mm
- Higher front end
- Frame reach
- +19 mm
- Longer frame reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Cervélo R5 XPLR is drawn. The Specialized Tarmac SL8 Pro Shimano numbers we have for size 58 are missing the wheelbase.
Geometry side by side
| Measurement | Cervélo R5 XPLR 54 | Specialized Tarmac SL8 Pro Shimano 58 | Difference |
|---|---|---|---|
| Reach | 383.3 | 402 | +19 mm |
| Stack | 544.6 | 591 | +46 mm |
| Head tube angle | 73 | 73.5 | +0.5° |
| Seat tube angle | 73.5 | 73.5 | ±0.0° |
| Effective top tube | 544 | not listed | |
| Chainstay length | 410 | 410 | ±0 mm |
| Wheelbase | 978 | not listed | |
| BB drop | 74 | not listed | |
| Head tube length | 132 | 184 | +52 mm |
Differences are the Specialized Tarmac SL8 Pro Shimano minus the Cervélo R5 XPLR. Full charts: 2026 Cervélo R5 XPLR, 2026 Specialized Tarmac SL8 Pro Shimano.
Where each sits in its class
Cervélo R5 XPLRSpecialized 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 R5 XPLRRed XPLR AXS 1 | Specialized Tarmac SL8 Pro ShimanoPro - Shimano Ultegra Di2 |
|---|---|---|
| Frame | Cervélo R5 | Specialized Tarmac SL8 |
| Shifter | SRAM RED | Shimano Ultegra R8170 |
| Derailleur | SRAM XPLR AXS | Shimano Ultegra R8150 Di2 |
| Cassette | SRAM RED | Shimano Ultegra |
| Crankset | SRAM RED AXS | Shimano Ultegra R81000 |
| Wheelset | Reserve 34|37TA ST | Roval Rapide CL III |
| Tire | Vittoria Corsa Speed | Specialized S-Works Turbo |
| Brake | SRAM Red AXS | Shimano Ultegra R8170 |
| Rotor | SRAM Red | 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 |
| Saddle | Prologo Nago R4 | Specialized Power Pro |
| Fork | not listed | Specialized FACT 10r |
| Chain | not listed | Shimano XT M8100 |
| Bottom bracket | not listed | Shimano Threaded BSA |
| Bar tape | not listed | Supacaz Super Sticky Kush |
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