A tyre inflated without a separate inner tube.

A tire construction which uses a rubber innerliner inside the casing to prevent air leakage and eliminate the need for an inner-tube.

1: Similar to a car tire, where the no tube is needed to keep the tire inflated. 2: Relatively new to the mountain bike world, tubeless tires can reduce the number of flats experienced due to hitting a hard object that may pinch and puncture an innertube.