Cervelo R5 Frameset

Complete R5s leave the factory on 26mm tires in service of the scale figure, but the geometry was designed around 29mm rubber and that is where most riders will land. The 34mm ceiling leaves headroom beyond that for rough race surfaces or winter miles, though there is no fender provision — the R5 is a race frame and makes no endurance claims. Pauline Ferrand-Prévot rode this frameset to the overall win at the Tour de France Femmes before it was formally announced, which is a reasonable indication of how it behaves when a race is decided on a climb and the descent that follows.

The one-piece HB18 cockpit reaches the R5 after its run on the S5, and it carries a large share of the weight story. A 40cm bar with a 100mm stem weighs 283 grams, roughly 134 grams under the two-piece HB13 bar and ST31 stem it replaces, most of that coming from clamp material and hardware that a single molded unit does not need, down to a 7-gram saving on the steerer top cap. Cervelo also claims a 2-watt reduction in drag at 48kmh averaged across yaw angles, which is the extent of the aerodynamic argument on a frame never built to chase it. The bar carries 4cm of flare from the hoods to the drops, and 15 width and length combinations are offered across the size range.

Seating is handled by the SP33 D-shaped seatpost, supplied in 0mm offset on sizes 48 through 56 and 15mm offset on the 58 and 61. The post is proprietary and no other seatpost should be used in the frame, so offset is a decision made at the point of order rather than adjusted later. A seatpost clamp assembly and cover ship with the frameset, and an internal holder mounted to the post carries the battery on Shimano Di2 builds.

The rest of the build planning lives in the hardware. The shell is BBright, the asymmetric standard Cervelo has run for over a decade, and the front derailleur attaches to a braze-on tab. Chainring clearance caps at 54/40T on a 44.5mm chainline or 56/43T on a 45mm chainline. The fork accepts flat mount calipers with no adapter, is specified for 160mm rotors only, and carries integrated thru-axle threads in the leg. Cervelo aero thru-axles ship front and rear, an FSA SL IS2 headset is included, and front and rear accessory mounts are fitted for a computer or a storage pod.

The R5 runs alongside the S5 rather than above or below it, and the split is straightforward: one platform argues with gravity, the other with air. If your riding is decided on climbs and technical descents, the frameset route puts you on the same chassis the professionals race, with the cockpit, post, headset, and axles already accounted for. You supply an electronic groupset, wheels, and a saddle.