Force AXS 12 Speed ChainThe SRAM Force AXS Chain uses Flattop technology to create a lighter, quieter, durable and stronger chain. It offers precise shifting. For the long distance junkies, this bike can be ridden far, long and fast. It can go the distance! Features Flattop technology allows for a narrower chain with quieter operation and increased strength and durability Hard Chrome plated inner and outer plates for faster and more precise shifts Requires new Flattop