SHIMANO JC41 Di2 Internal Frame Junction Box Bicycle ComputersSHIMANO JC41 Di2 Internal Frame Junction Box Bicycle Computers Streamline your Di2 setup with Shimanos compact internal junction box, designed to connect and manage up to four ETube components inside your frame. Best for Riders building or upgrading a Shimano Di2 electronic shifting system Cyclists who want a clean, internal cable routing solution Mechanics seeking reliable multiport connectivity for Di2 components Not ideal for Mechanical shifting

* Compatibility Exact Actuation* SRAM Model ID: RD-X5-A1​​

Total Protection: Engineered to shield the rider’s skull from direct force while significantly reducing energy transfer to the neck and spinal column

Our products are intelligently engineered and designed

Anti-Steam Ventilation: The of moisture management

Value Strategy: The of affordability

This mount positions a Garmin cycling computer above the stem while providing an integrated GoPro-style mounting point below for a compatible light or action camera

wind-cheating performance and offers excellent ergonomic support for the hands

This means a greater gearing range for bigger adventures

Developed and validated in the Enduro World Series

KwikWick 3 anti-microbial fabric liner keeps the rider cool and dry in warm weather

This helmet ensures exceptional fit

60 Tire Diameter 20" Tire Intended Use Mountain Tire Type Clincher Color / Defined Color Black ISO Diameter 406 / 20" BMX ISO Width (mm) 66 TPI (Threads Per Inch) 60 Tire Bead Wire *TPI indicates the density of the casing fabric