What is advantage of tubeless tyres over radial tyres?

The tubeless tyres are safer than tubed tyres when it comes to punctures in the tread region. In the event of a nail hole or other small penetrations in the tread region, the air leakage is very slow and sometimes, not at all, as the rubber may make a seal around the penetrating object. In fact, on many occasions we have had nails and other foreign objects lodged in the tubeless tyres of our own personal cars and bikes and we have motored to safety and on to the tyrewallah to get it repaired in comfort. In place of the tube in a normal tyre, the tyre and the rim of the wheel form an air container in a tubeless tyre. To 'seal in the air', in this tyre-rim compartment, the inner wall of the tyre is throughly lined with an impermeable, air-tight membrane. The inner liner of the tubeless tyre is constructed of halo-butyl/chlorobutyl and other materials. This performs, in essence, the important chore of substantially reducing the permeation of air, as compared to the natural rubber inner liner, a function of which is why we use a butyl tube in a tubed tyre.

A tubeless tyre also comes with a soft rubber chaffer, distinct from a rubberised fabric chaffer in a tubed tyre. This works as an all-round air seal between the tyre and rim.

As there is no tube, and, hence, no tube valve, a specialised valve is employed for increasing/reducing the air pressure in a tubeless tyre. The valve (check out the line drawing to see how it mounts) sits on the tyre rim and is ingeniously sealed by a large high quality rubber seal which is easy to mount. Shashank