2.75-21 Inner tube also fits 3.00-21 And 90/90-21 TR4 Straight Metal Valve

Will fit 2.75-21 3.00-21 and 90/90-21 Motorcycle and bike rims.

Inflation of inner tube can be achieved using a standard car foot pump as our tubes are fitted with a schrader type valve as used on car rims and wheels.

Our tubes are made from high quality butyl rubber, which is a synthetic rubber unlike natural rubber which is porous and  leaks under pressure. Butyl is air-tight and will out last the natural rubber inner tube.

Specification:

Valve Type:   Schrader (car type)

Valve angle:  TR4 Straight Metal Valve (SMV)

Wheel Rim Size:  21"

Material:   Butyl Rubber

Brand:   BlackRing

To Fit Sizes:  2.75-21 3.00-21 90/90-21