The Angel SmarTube X is Pirelli's latest innovation in the world of tubes designed to protect and provide comfort for daily riding and fast urban commuting. Made with thermoplastic polyurethane (TPU), a material that can save up to 70% of the weight while being stronger than butyl as a raw material. This product is 3 times thicker than a standard SmarTube, and allows the cyclist to be more agile while being extremely protected at the same time. - The volume of the Angel SmarTube X saves 50% of space in your pockets, while being stronger than a butyl tube and saving up to 70% of the weight - 3 times thicker than a standard SmarTube, allowing it to be extremely resistant and protected to challenge any obstacle on your ride - Compatible with disc and rim brakes