SRAM XX T-Type E-MTB Chainrings Designed specifically for use e-mtb drive systems SRAM's XX T-Type direct-mount rings offer light weight with optimal retention performance needed for e-mtb. Features Steel and Aluminum construction SPECIFICATIONSMaterial Aluminum Round or Oval Round Designed for ebike Yes Drivetrain Speeds12Chainring BCDDirect Mount | Sram | Xx T-Type E-Mtb Chainring 34T Tq Ebike Dm | Aluminum