3-Speed internal gear hub with gear ratio of 177% Gear steps of 33% Rotary gear selector without protrusions outside the frame 6061 Aluminium hub shell Compatible with 17 to 19 teeth sprocket Anodized finish Includes trim kit and TSC30 twist shifter RR 3s FW 36H B/O 3/8 Alloy Sil 990g RIM 135mmUPC/EAN/GTIN: 4710944257595