5-Speed internal gear, 6-bolt disc hub with gear ratio of 243% 5-Speed internal gear, 6-bolt disc hub with gear ratio of 243% Gear steps of 25%, 25%, 25% and 25% Rotary gear selector without protrusions outside the frame Designed for heavy duty use 6061 Aluminium hub shell Compatible with 16 to 22 teeth sprocket Trim kit, shifter and cable included