corona sram xx eagle transmission t type direct mount boschSpecifically designed for use with Bosch motor systems, this chainring is the lightest and most advanced e bike specific chainring ever designed. Combining performance and design aesthetics without compromising longevity, the ring is also compatible with our Aero Guard to provide greater durability and protection on rough terrain. FEATURES A perfect combination of lightweight aluminum and the durability of a steel running surface. Compatible with