Aeron Extra Lite Protect 650b/700c TPU Tube Extra Light. Extra Strong. The Aeron Extra Lite TPU Airtube is engineered for Gravel and XC riders seeking the perfect balance of puncture resistance and ultra-lightweight performance. Its highly elastic shell deforms under impact to provide extreme durability, while the featherweight design is up to 63% lighter than standard butyl tubes for effortless storage. Featuring a resilient polymer valve stem and superior air retention, the Aeron Extra Lite ensures you spend more time on the trail and less time dealing with maintenance. Features TPU construction up to 63% lighter than comparable butyl tubes, with lower rolling resistance and better air retention Protection Level 3 (Extra Lite Protect)superior puncture resistance over the Super Lite Race line, tuned for endurance and mixed-surface riding Compatible with 650B and 700C wheels, 32-52mm tire width covers a wide range of gravel, CX, and mixed-terrain tires Polymer Presta valve, available in 42mm and 65mm lengths 65mm clears most mid-depth rims without an extension Ultra-compact packed size rolls down small enough to carry multiple spares without adding bulk to a jersey pocket or frame bag Specifications Valve Type Presta Valve (Polymer)Valve Length42mm, 65mm Wheel Diameter650B / 700c Compatible Tire Width32-52mm Material TPU (Thermoplastic Polyurethane)Weight56g (42mm valve) / 57g (65mm valve)Intended Use Gravel, Road | Aeron | Extralite Protect 650B/700C Tpu Tube 650/700X32-52, 42Mm | Polyurethane