Got a flat on a kids' bike, BMX, or a folding bike? This 2-pack of Goodyear 20-inch bike tubes will get you rolling again in no time. They're heavy-duty tubes designed to fit a wide range of 20-inch tires: from 20 x 1.75 up to 20 x 2.125 width. That covers most common 20-inch sizes. They're brand new, unused, and come in their retail packaging. Perfect to keep one as a spare and one ready to install. Having a couple of these on hand is a lifesaver for any parent or bike owner – flat tires always happen at the worst time! UPC: 313038914981. A simple, essential repair item for any garage or bike shed.