sram kette pc rival axs 12 fach inkl powerlock 120 gliederThe Flattop technology of the SRAM Rival chain creates a lighter, quieter, stronger chain that's compatible with 12 speed 1x and 2x eTap AXS drivetrains. Ride far, long and fastthis chain can go the distance. Flattop technology allows for a narrower chain with quieter operation and increased strength and durability Use for both 1x and 2x eTap AXS Includes Flattop PowerLock