Pirelli P Zero Smar TUBE Tube Oh Yeah, It's Big Brain Time Lightness plays a key factor in how fast a wheel can rotate. With a lighter setup, your wheels can rotate faster and you can accelerate more efficiently. The Pirelli P Zero Smar TUBE Tube is the most advanced inner tube in the Pirelli lineup. This tube is made of Thermoplastic Polyurethane, also known as TPU, making it 70% lighter, up to 50% more compact, and as resistant against punctures as an equivalent tube made of butyl. Features Ultralight at only 35g per tube Made of TPU that is lighter and just as durable as butyl tubes More compact so you can pack more in your bag SPECIFICATIONSWheel Size700c Width23 - 32mm Valve Type Presta Removable Core-Stem Length / Type60mm, Not Threaded Weight35g | Pirelli | P Zero Smartube Tube 700 X 23-32Mm, 42Mm | Polyurethane