SRAM Force Flattop 12 speed Chain### Sram Says ### Beyond an incremental improvement. The Flattop technology of the SRAM Force chain creates a lighter, quieter, stronger chain. Ride far, long and fast this chain can go the distance. 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 Powerlock