Academy pro cassette wheelthe academy cassette wheel runs on incredibly smooth and durable sealed cartridge bearings it features a one piece 9t driver which enables you to run a compact 25t chainring on the front and a 14mm male axle for superior strength when using pegs features fully sealed bearing alloy cassette hub fully sealed bearing one piece crmo 9t driver 14mm crmo male axle 36 hole rhd weight 1309gbuyacademy wheels tyresfrom chain reaction cycles the worlds largest online bik