What Our Gearhead(R) Experts Are Saying: "I've put miles on the P5 Ultegra Di2 and love how balanced it feels for a pure aero bike. The electronic shifting is flawless under load, and the cockpit adjustability makes it easy to dial in a powerful, comfortable position. Add in the Reserve wheels and integrated storage, and it's as race-ready as it gets."The Cervelo P5 Ultegra Di2 Road Bike is a pure racing machine designed to turn every watt into speed. Built for triathlons and time trials, the P5 is equally at home slicing through Kona's winds as it is carrying riders to victory in the Tour de France. For us, it's about the confidence that comes with knowing our bike is optimized for aerodynamics, efficiency, and endurance. Cervelo paired the P5's carbon frameset with Shimano's Ultegra Di2 12-speed electronic shifting for precision control and effortless transitions, even at max effort. The Reserve 77/88 wheelset keeps momentum rolling in crosswinds, while Vittoria's tubeless-ready tires reduce rolling resistance without sacrificing grip. Fit adjustability in the cockpit makes it easier than ever to lock in an aero position, and integrated hydration and nutrition storage ensures we can fuel properly during long-course events. The P5 Ultegra Di2 isn't just a road bike-it's the ultimate tool for chasing fast times. Heads up - We do our best to keep bike specs and images current, but occasional component changes can happen without warning-and sometimes the photos might not show the exact build you'll receive. If you want to doublecheck the details, our Gearheads are always here to help.