Mickey Thompson natural rubber racing tubes are easy to mount. They are lighter, more flexible, and have better heat distribution than synthetic butyl rubber tubes. These racing tubes have a metal valve that clamps to your wheel to make them easy to mount and inflate. 100 Percent Natural Rubber Aircraft Type Removable Valve Stem Valve Clamps To Wheel Extremely Lightweight And Durable Resistance To Deterioration MPN: 90000000289 Specifications Brand Mickey Thompson Part Number 248923 Old Part Number 90000000289 Tube Size 9.50-15/16 Intended Tire Diameter Minimum 24.5 in Intended Tire Diameter Maximum 28 in Intended Tire Tread Width Minimum 8 in Intended Tire Tread Width Maximum 10.5 in Intended Wheel Diameter 15in | 16in Removable Valve Stem Yes Valve Stem Material Steel Material Rubber Color Black Finish Natural Quantity Each