Designed specifically for time trial and triathlon, Corsa Pro Speed revolutionizes the racing experience of pro riders and performance-oriented amateur riders. By seamlessly tapering the tread into the sidewall, the Corsa Pro Speed construction combines the Graphene + Silica compound, ultra-supple cotton casing, and updated tread pattern, all electrically cured to minimize rolling resistance. The results of internal testing show an improvement in rolling performance of 5%, with 2% savings in weight. Whether you're a professional racer or amateur racer, the Corsa PRO Speed is designed to enhance your riding experience and achieve your best performance in Time Trial and Triathlon use. - Graphene + Silica formulation ensures optimal speed, safety and control.This technology is specifically designed for the intended TT use, maximizing speed, yet providing a very high level of grip on wet surfaces - Lightweight cotton and durable aramid, spun in a 320 TPI casing that combines the former's intuitive, supple road feel with the latter's puncture resistance. Small impacts are smoothed, road noise is muted, rolling resistance is reduced, and more of the tire maintains contact with the road - Not approved for use with hookless rims