Designed specifically for use with TQ motor systems, this chainring is the lightest, most advanced e-specific ring ever created. Pairing performance and design aesthetic to give you the highest-end E-MTB ring SRAM produces. Steel and Aluminium construction. Compatible with TQ HPR 50 motor system Limited AeroGuard Compatibility that fulfills EN 15194:2017 standard Lockring not included Nominal Chain Line 55cm SRAM Model ID: CR-XX-TQ-A1