The Tubolito Tubo CX/Gravel 700c inner tube is ultra light weight and very durable. It is made of a thermoplastic elastomer, called TPU. This group of materials is known for its durability and excellent damping capabilities. It has already replaced many rubber products in the automotive and pharmaceutical industries. Developed to have the minimum storage size possible. Made for tire widths from 30 to 40 mm and ready for rim brakes and disc brakes Tubo-CX/Gravel.