Vittoria Triathlon Speed Tubular The worlds fastest triathlon tire, designed for maximum speed as well as optimized puncture protection. Although the emphasis of this highspeed tire is on aerodynamics & pure racing pedigree, it comes with a butyl inner tube to ensure air retention in the holding area. Optimized size & width to match modern aero wheels for the best aerodynamics Reinforced Corespun K casing for increased sidewall protection Graphene-enhanced compound for speed & puncture resistance