Cervelo P 105 Bike

Cervelo P 105 Bike is the entry point into Cervélo's P-Series triathlon platform, which shares its frame development, wind tunnel time, and testing with the brand's flagship WorldTour time trial bike, the P5. At $5,300, this build pairs that shared frame with a Shimano 105 mechanical groupset, making it one of the more accessible ways into a genuine triathlon-specific bike rather than a road bike with clip-on bars.

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 the rest of the build. Cervélo's in-frame storage rolls hold a spare tube and flat kit inside the frame rather than in a saddle bag, a rear hydration mount and front computer mount keep nutrition and data within reach without breaking your position, and a Smartpak top tube bag adds additional storage for race-day nutrition. A single Profile Design carbon bottle cage and a Cervélo Tri Saddle, shaped for the forward-rotated position triathletes ride in, complete the build.

The Cervelo P 105 is available in Haleakala and Abyss across six frame sizes from 48cm to 61cm. For a triathlete who wants a real aero platform, not just a road bike with bolt-on bars, and who'd rather put their budget toward wheels or a proper bike fit than an electronic groupset, this is the bike we'd point them to first.