The 2015 Colnago K.Zero is a frame proven at the highest level of road time trialing and speed is its forte.
Available in 4 sizes, the ~5.5lb frame is laterally stiff to be equally good at sprinting out of corners and climbing hills with powerful efficiency. NACA (the US National Advisory Committee for Aeronautics) airfoil profiles form the foundation for the development of the tubeset and Colnago has modified each tube for every position on the bike.
Colnago knows that bicycle efficiency come from two key areas: rear power conversion, and drag resistance. All of their bicycles are exceptionally good at turning rider power into rear wheel power, so the main area for improvements in efficiency are in drag resistance. With the Colnago K.Zero they have increased performance in over the bicycle airflow while maintaining UCI compliance for competition use.