Redline proline pro xl bmx bikeif youre looking to get serious about bmxing then redlines proline pro xl bmx should be taken into consideration this bike offers performance and value thats second to none with its redline formed 6061 t 6 alloy frame aluminium sealed hubs and 100 crmo multi butted and tapered race fork quick release aluminium seatpostthe proline pro xl also features the tektro brake system sun rhyno lite rims and stainless steel spokes as well as redlines quick release a