Thorn-Resistant Schrader Valve Tube - 20 x 1.5-2.3

This tube is designed to combat punctures from thorns and other sharp objects while maintaining performance. The construction features a thicker outer side (the part against the tire) to stop sharp objects from puncturing all the way through the tube, while the inner side (the part against the rim) is thinner to reduce weight. This asymmetrical design allows you to gain puncture protection without sacrificing performance.