Cervelo P5 Time Trial Disc*Please Call To Check For Sizes, Colour & Build* SIMPLY. FASTER. For the P5 we focused entirely on aero performancewithin the boxes defined by the UCI, anyway. We applied years of experience in engineering the fastest aero bikes and real world testing with our pro athletes. The result is a bike that pushes the boundaries in every way possible. We spent hours in CFD, FEA, and ISO testing and the reviews came back from our athletes: BRB.