The P Zero SmarTube EVO is Pirelli's latest innovation in the world of tubes, designed to improve performance in modern cycling. 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 SmarTube EVO rolls 5% faster than the standard SmarTube, making your bike quicker to accelerate and climb hills, while also improving handling. - The weight of P Zero SmarTube EVO is up to 70% less than a standard butyl tube and also more resistant - Thanks to a 5% improvement in rolling, the P Zero SmarTube EVO makes your bike faster and easier to handle both on the steepest climbs and during accelleration - The volume is almost 50% of the space in your pockets, while being stronger than butyl as a raw material - Compatible with disc brakes only