You may wonder: "what is so special about a single speed chain?" Indeed, most manufacturers offer one model only. KMC disagrees. A chain for a Rohloff internal gear has totally different requirements compared to a chain fitted on a children's bike. That's why KMC has put a lot of effort into research- and development of these chains, solely for single speed or internal gear bikes.

World’s best single speed chain is KMC’s X1. The first chain to be developed specifically for top quality bikes with internal gear hubs, like Rohloff, Alfine or Nexus.

The X1 is unique. It has a specific single speed character and is extremely durable.