Hope Pro 4 Rear Hub: Industry leading rear MTB disc hub CNC 2014 T6 Aluminium body Steel or aluminium freehubs in Shimano 10/11 speed or SRAM XD Multiple widths & axle options 24, 28, 32, & 36 hole drillings Large spoke flange for stiffer wheels 44 tooth, 4 pawl rapid 8.2 degree engagement Most compatibility options of any hub Wide range of colours Weight from 300g