BMX Race Frames Pro

BMX Race Frames Pro: frames in the Pro size class. Top tube approx. 20.25" to 21", for a rider height of approx. 5'3" to 5'11" (160 to 180 cm). These are guide values; every brand publishes its own chart, and at the boundary it comes down to preference: smaller is nimbler, larger is calmer on the straights.