Power meter, without chainring, black 12-speed compatible, including eight Torx T20 screws Accessory type Main color black Compatible with:Red eTap AXS 1x cranks with 36t to 46t chainringForce eTap AXS 1x cranks with 36t to 46t chainringForce eTap AXS 2x cranks with 33-46t and 35-48t chainringNowadays, 1x cranks have a DM chainring mounted, a chainring that fits the power meter with 107 BCD must be mounted.Sram Article number: 719345 EAN code: 710845825583