Like all mechanical parts, chain rings are subject to wear. If you need to replace a worn chain ring and you are looking for a perfect replacement, then you will find the right spare part here. Please note that the different drive manufacturers also require different chain rings. We also offer chainwheel sets for e-bikes. For special use in interaction with the battery-powered motor and the associated higher forces, there are special sprockets. We offer sprockets for the following Bosch drives.