bike free wheel 1.Single Speed Freewheel 2. Size : 1/2" x 1/8" x 16T Finish: Black, Brown, CP 16-18 Teeth Bike free wheel :Specifications: bike free wheelSize:14T,16T,18T,Material: steel, stainless steelGross weight:23KG Detail:Product:20 teeth single stage freewheelModel:HY-20TSize:12.7*3*20Tfinish:electrophoresis,yellowing,ChromeQty:100pcs/ctnN.W:25KGG.W:26KGPacking:41*17*17.5 bike free wheel