Easton Asymmetric 11-Speed Chainring For 2x11-Speed The Easton asymmetric 11-speed chainring is manufactured from lightweight aluminum. Features Made from lightweight aluminum Designed for 2x11-speed drivetrains SPECIFICATIONSDrive Train Speed11Tooth Count53, 50, 39, 34TBolt Center Diameter-Material Aluminum Intended Use Road Weight N/A | Easton | Asymmetric 11-Speed Chainring 39T | Aluminum