We make innertubes. You need them, and we knew we’d be able to provide a good one. Ours are made of the highest quality rubber we could find, and are designed to fit today's wider 2.40”+ tires with ease. Available in 20" and 22". Size: 20" or 22" versionWeight: 149g (5.2oz) - 20"Special features:• fits larger 2.40"+ sized tires• high-pressure rubber• requires air