3 Speed 70mm Drum Brake Rear Hub 3-Speed internal gear hub with gear ratio of 177% Rotary gear selector without protrusions outside the frame A356 Aluminium hub shell 36 Spoke holes Compatible with 17 to 19 teeth sprocket Natural alloy finish Weight - 1440g Includes trim kit and twists shifter RR 3s Int 36H Aluminum Sil 1440g DRUM 135mm