Shimano freewheel 16 tands Product Description The DX freewheel SF-MX30 by Shimano - for singlespeed drivetrains The Shimano DX freewheel SF-MX30 is a bolt on sprocket for singlespeed or 1x drivetrains. It is made of steel and is compatible with 1/2" x 3/32" chain sizes. The sprocket has 16, 17 or 18 teeth. Technical Information:Series:DXApplication:BMXGearing:1Teeth:16 t, 17 t, 18 tCompatibility - Chains:1/2" x 3/32"Material:steelManufacturer Numbers:16 tooth:I-SFMX301617 tooth:I-SFMX301718 tooth:I-SFMX3018Contents:1 x Shimano DX SF-MX30 freewheel Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com