5-Speed internal gear, coaster brake 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 5s 32H B/O 3/8 Aly Sil CB 135mm 95.5 95.5UPC/EAN/GTIN: 4710944258301