More informationUL chainrings are the lightest XC and Gravel chainrings on the market. Using the SL model as a platform, we strategically modified its machining and design to achieve the same resistance with a great reduction in weight. UL chainrings have a -5 mm offset (Boost), for use with XCX Race Mountain model cranks on bicycles Boost. UL chainrings are compatible with XCX Race Gravel cranksets on Boost (148mm) and non-Boost (142mm) bikes. UL chainrings are compatible with TRS/LG1 cranksets for SuperBoost. If using decreases overall system wear.Color: BlackCompatibility: 10/11/12 speed, Compatible with Shimano™ and SRAM™ 12-speed drivetrains.Features: 7050 Material aluminumQuickConnect ™Measurements: 30-42t Weights:30t: 52g32t: 54g34t: 58g36t: 64g38t: 70g40t: 79g42T: 86g