Cervelo P 105

The P-Series frame uses a D-shaped steerer tube with a round stem interface, a deliberate departure from the fully integrated, proprietary cockpits found on many high-end TT bikes. That means you can run whichever basebar and extensions suit your position, and change them later if your fit or preference changes, which matters more on a triathlon bike than a pure TT bike since triathletes often fine-tune their position over multiple seasons. Cervélo also increased tire and wheel clearance on this generation, cleaned up the cable routing, and added the brand's first internal frame storage on a triathlon bike, all aimed at making the P-Series faster and more practical for long-course racing, not just criterium-length time trials.

This build runs a Shimano 105 R7100 mechanical groupset, including a 105 crankset with a 4iiii Precision single-sided power meter built in, 52/36 chainrings, and an 11-34 cassette for a wide enough range to handle hilly courses as well as flat time trial efforts. Because clip-on aero extensions don't have room for standard shift levers, this build routes shifting to microSHIFT bar-end shifters mounted at the ends of a Profile Design Wing alloy basebar and clip-on extensions, a setup common on mechanical-groupset TT and tri bikes. Riderever carbon brakes with Shimano Centerlock rotors handle braking, Vision TC60 wheels provide a reasonably deep, aero-shaped rim without the cost of a carbon tubular race wheelset, and Vittoria Corsa N.EXT tubeless tires round out the rolling stock.

Triathlon-specific practicality shows up throughout…