Bell Sports Standard Bicycle Inner Tube is a high-quality inner tube that will get you back to commuting or leisurely riding in no time. They fit any bicycle with a 18 x 1.75-2.25 size. The Schrader inner tube will help prevent high-pressure blow-outs. The cured rubber construction results in a consistent side wall for smooth pedaling. This Schrader replacement tube uses a standard 35mm Schrader valve to accommodate most bike pumps. Two tire levers a tube and pump is required for replacement. If you spring a leak or go flat keep one of these handy tubes nearby to get back on the road.