Snafu race qr seat clamp jet fuelthe snafu race qr seat clamp jet fuel is designed to fit most alloy full size bmx frames with a 31 8mm od seat tube the quick release lever makes adjusting your seat height quick and effortless ideal for when cruising down to your local spot and would prefer to sit and relax on the way there or when going home again featuresmaterial 6061 t6 aluminium alloyeasy to adjustbuy snafu components from chain reaction cycles the worlds largest online bike store