The quality of Shimano Original parts is convincing. Each part is extensively tested and inspected. Shimano's internal requirements are often higher than industry standards and norms. This brings safety and reliability. Segmentation into groups clearly classifies performance according to the top-down principle. Only Shimano original parts fit perfectly to the Shimano components. The optimum fitting accuracy facilitates replacement and meets the highest demands in all respects.Shimano HG (Hyperglide) chainsThe chain transfers the force from the chainring to the sprocket of the rear wheel hub. It is exposed to extreme loads and weather conditions. Chains lengthen at different speeds depending on the conditions of use, but each chain must be replaced sooner or later. Replacing the chain in good time is the only way to protect chainrings and sprockets from excessive wear. To get the best possible performance from the Shimano HyperDrive System, it is important to drive original Shimano HG chains.