For 12-speed, aluminum, black For screw mounting for powermeter spider, incl. pin thread lock, set Number of teeth 50 Type Article Fastening Screw fastening Group SRAM Main color black Rear gear stages 12-speed Front gear stages 2-speed This SRAM Thread Mount 2x chainring is designed as part of the Force AXS groupset and is part of an innovative system to minimize weight while maximizing the stiffness and accuracy of the power meter. Changing chainrings is easy with a matching wrench (sold separately). The Thread Mount design is light, stiff and precise. Available in 46/33, 48/35 and 50/37 chainring combinations. Compatible with all road Flattop chains. SRAM Thread Mount chainring tool required for assembly (sold separately). SRAM Article number: Retail packaging: Yes