Redline proline expert bmx bikeif youre looking to get serious about bmx racing then redlines proline expert bmx could be just the bike this bmx offers performance and value thats hard to beat with its redline formed 6061 t 6 alloy frame sealed hubs and 100 crmo multi butted and tapered race fork tioga power block tyresthe proline expert also features a tektro brake system aluminium hubs and stainless steel spokes as well as tioga power block tyres and pro hex grips featuresframe redl