Se racing ripper x bmx bikethe new se racing ripper x bmx bike is built with a super stiff aluminium frame and 6066 aluminium landing gear forks meaning that this ride weighs in at a featherweight 748kg the lightweight 6066 aluminium frame is built with a floval top tube bi oval downtube and rectangular rear stays for maximum stiffness alienation ankle biter rims built with sealed cassette hubs with lightweight hollow axles have excellent durability and strength whilst keeping the weight dow