Pirelli P Zero Smar TUBE EVO 700c The Latest Innovation The P ZERO Smar TUBE EVO is Pirelli's latest innovation in the world of tubes, as we strive to improve performance in modern cycling. They are the result of our development of World Tour tubulars, now made available for everyday rides with clinchers. Made of thermoplastic polyurethane (TPU), it can save up to 70% of the weight of ordinary butyl tubing and nearly 50% of pocket space while being stronger than butyl as a raw material. P ZERO Smar TUBE EVO rolls 5% faster than the standard Smar TUBE, making your bike quicker to accelerate and climb hills, while also improving handling. P ZERO Smar TUBE EVO comes with a Presta valve, available in a full range of valve heights to fit every rim. Features Weighs up to 70% less than a standard butyl tube and is also more resistant Saves nearly 50% of pocket space while being stronger than butyl as a raw material Rolls 5% faster than the standard Smar TUBESPECIFICATIONSWheel Size700c Width25 - 28c Valve Type Presta Removable Core No Stem Length / Type42, 60, 80mm / Non-Threaded Weight35g - 40g | Pirelli | P Zero Smarttube Evo 700C 700X25-28C 42Mm | Polyurethane