Shimano FC-M985 CHAINRING Review Posted on August 8, 2018November 9, 2018 By ArchSeaLionPosted in Drivetrain ComponentsTagged Cycling, Outdoor Recreation, Parts & Components, Sports & Outdoors, XTR Type: Double Speed: 10-speed Original Shimano parts guarantees that all components work perfectly for optimum performance and maximum safety and longevity.