Single Speed Cassette Cog Bike Freewheel Professional Lightweight Conversion Set for Mountain Road Bikes, 17T

【Feature】: Its lightweight design won't add extra burden to your bike while its scientific design increases contact area to protect the drum body. 【High Quality Material】: This Bicycle single speed cassette cog is made of alloy, It boasts high strength, sturdy, and durability for long term use. 【Design】: Specifically designed for the conversion of fixed gears of 6 bolt disc drum singlespeeds. 【Package Contain】: The package includes a 19mm spacer, a 14mm spacer, a 11.8mm spacer, a single speed cassette freewheel, end rings and lock rings for convenient usage. 【Compatibility】: The Bicycle Single Speed Freewheel is suitable for 10/11 speeds drum conversions.