Shimano SM-JC40 Di2 External 4-Port Frame Junction Box for E-Tube Systems Type_Zip Tie enhancing safety and control during

enhancing safety and control during your ride

Engineered with a meticulously engineered downturned profile

Enhanced control and confidence with Shimano Tiagra ST-4725/BR-4770 Hydraulic Shift and Brake Lever Set

these cleats feature an ultra-compact profile that minimizes weight for improved cycling performance and efficiency

Shimano SM-JC40 Di2 External 4-Port Frame Junction Box for E-Tube Systems Type_Zip Tie enhancing safety and control duringBoost your Shimano Di2 electronic shifting system with the Shimano SM JC40 Di2 External Frame Junction Box (4 Port). Designed for seamless integration and reliable performance, this high quality junction box is a vital component for custom electronic bike setups and professional upgrades. Materials & Construction: Crafted from durable, lightweight materials, the Shimano SM JC40 Junction Box ensures long lasting performance under rugged cycling