Lighter, more compact, and more durable. Yep, you get all three. The NanoAir TPU (Thermoplastic Polyurethane) tubes were designed to be compact and pack down to one third of the size of a traditional tube. It's 60% lighter than a traditional tube, making it a great option to reduce rolling weight and easy enough to carry a spare. The NanoAir TPU tubes are tough, with a special construction/layup of material these are more durable than traditional butyl tubes. Having one of "those days," and you ride through a patch of thorns and get another flat? Don't worry, each tube includes a few extra TPU patches to keep you rolling. Made from TPU (Thermoplastic Polyurethane)Lightweight and durable inner tube solution that's compact, while offering reliable performanceReduces rotational weight compared to a butyl tubeAn ideal spare tube to carry on any rideAlloy presta valveIncludes TPU patchesItem SpecificationsISO Diameter584 / 650b / 27.5"ISO Width (mm)63ISO Width (mm)64ISO Width (mm)65ISO Width (mm)66ISO Width (mm)67ISO Width (mm)68ISO Width (mm)69ISO Width (mm)70ISO Width (mm)71ISO Width (mm)72ISO Width (mm)73ISO Width (mm)74ISO Width (mm)75ISO Width (mm)76Labeled Size27.5 x 2.5 - 3.0Shaft TypeSmoothTube CompoundThermoplastic ElastomerValve CoreFixedValve LengthMed 41-55mmValvePresta Med 41-55mm WTB NanoAir TPU Tube Tubes UPC: 714401150935