Shimano Genuine Parts maintain the precision and function of the components for optimum performance, maximum safety and long durability. The quality of Shimano Genuine Parts is impressive. Every part is extensively tested and inspected. Shimano's internal requirements are often higher than those of industry standards and norms. This ensures safety and reliability. The segmentation into groups clearly categorises performance according to the top-down principle. This clearly defines the respective Shimano performance level. Only Shimano original parts fit perfectly with Shimano components. The optimum fit facilitates replacement and fulfils the highest demands in all respects.