P ZERO™ Velo Tub is the result of several months of intensive development work of the R&D department of Pirelli with World Tour PRO cyclists and mechanics. All the elements of the final version of P ZERO™ Velo Tub has been tested, modified and tuned on that environment: built on the finest 320tpi Corespun with aramid reinforced casing, latex inner tube for improved weight, rolling and puncture protection; Yellow Soft compound for uncompromising grip and handling performances.P ZERO™ Velo Tub is a ready-to-race handmade tubular tyre and is perfect for Granfondo racing as well as shorter high-paced races, while also being a solid and reliable tyre for everyday riding.World class grip performance,Latest tubular technology,Approved by World Tour PRO riders and mechanics,Winning tubular for amateurs and passionate cyclists,Racing feeling and speed,48mm RVC valve.