SRAM Force eTap AXS 12sp ChainThe SRAM Force AXS 12 speed Flattop Chain features a unique link shape that creates a lighter, quieter, and stronger chain. Flattop technology allows for a narrower chain with quieter operation and increased strength and durability Hard Chrome plated inner and outer plates allow for faster and more precise shifts Requires Flattop Powerlock Compatible only with eTap AXS rear derailleurs Links: choose; 114, or 120 Drivetrain Speeds: 12 Weight: 178g.