Shimano Di2 External Battery Mount Base Unit - Compatible, Durable, Secure Tire Width_42 mm Equipped with a barrel lock

Equipped with a barrel lock closure system

high-performance Samox M3 Crankset - the perfect upgrade for riders seeking reliable power transfer

Designed with a globally balanced magnetic needle

Engineered with premium synthetic and microfiber materials for lightweight durability and a precise fit

Shimano Di2 External Battery Mount Base Unit - Compatible, Durable, Secure Tire Width_42 mm Equipped with a barrel lockUpgrade Your Shimano Di2 System with the BMR1 and BRM2 External Battery Mount Base Units Optimize your e bike's drivetrain with the Shimano BMR1 and BRM2 Di2 External Battery Mount Base Units engineered for durability, reliability, and seamless power management. Designed specifically for Shimano's cutting edge Di2 electronic shifting systems, these mounts provide a secure, professional solution for external battery installation, ensuring optimal