Maxxis Welter Weight 16x1.90-2.125 SchraderMaxxis WelterWeight 16x1.90-2.125 Schrader Valve Tube is a great choice for everything from everyday street riding to jumps and ramp riding. This tube is specifically good for BMX riding, due to its thick 9mm design. It’s a lightweight design that weighs only 200 gram. Made with Butyl rubber.4717784023755