Designed specifically for use with Fazua motor systems, this chainring is the lightest, most advanced e-specific ring ever designed. Pairing performance and design aesthetic to give you the highest-end E-MTB ring SRAM produces. Model: CR-XX-FAZ-A1 Steel and Aluminium construction. Compatible with Fazua Ride 60 motor system Limited AeroGuard Compatability that fulfills EN 15194:2017 standard Lockring not included Nominal Chain Line 55cm Direct Mount, X-Sync 2