SOLID DURABLE The Zippa DH features a fully CNCd AL6061 backplate fully CNCd AL7075 pulley and the tough and light bash plate fending off damage from rocks and roots Ideal Chain Retention The Zippa DH keeps your chain held firmly in place and the bash plate protects you and your bike against damage Tooth Capacity Compatible with 32T to 38T single 1X chainring Mounting Standard Fits with ISCG05 or BB via external BB adapter EASY TO USE Its simple to install and all parts are fully replaceable It weighs 175g tough enough to ensure the ultimate protection when riding