Designed specifically for use with Bosch motor systems, this chainring is the lightest, most advanced e-specific ring ever designed. Pairing performance and design aesthetic without compromising longevity, the ring is also compatible with our Aero-Guard to provide increased durability and protection through rough terrain.Key Features:A perfect combination of lightweight ALU and the durability of a steel running surface.Compatible with Bosch motor systems.AeroGuard Compatible that fufills EN 15194:2017 standard