At My Ride we stock a huge range of tubes to suit kids bikes between 12 and 24 inches. Take a look below to find the tube to suit your kids bike. Kids bikes commonly come in 12, 16, 20 and 24 inch sizes. Sizes in between are often available but if they're not visible online it may be best to contact your local My Ride store. Tubes of this size are generally found on kids bicycles and prams.