SRAM XX Eagle T-Type DM E-MTB STEPSDesigned specifically for use with Steps 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. Steel and Aluminium construction. Compatible with Steps motor systems. SRAM Model ID: CR XX SS D1 Attributes Material Aluminum Steel BCD Direct Mount Chainring Comp. Eagle Transmission (T Type) Narrow Wide Design X Sync 2 Speed 12 Primary