SHIMANO Di2 M-EW90-A JUNCTION 3 PORT Bottom Bracket & Pedals Tools Reversible valve insert for all

Reversible valve insert for all valves

Shortenable hook and loop fasteners

Reversible for additional clearance

Resists angle grinder attacks

SHIMANO Di2 M-EW90-A JUNCTION 3 PORT Bottom Bracket & Pedals Tools Reversible valve insert for allThe Shimano Di2 SM EW90 A Junction Box is a three port hub designed for cockpit mounted electronic shifting systems. This compact junction allows seamless integration of multiple Di2 components in the handlebar area, distributing power and signals efficiently across your drivetrain controls. Perfect for riders building custom cockpit setups, the SM EW90 A supports clean cable routing and reliable connections between your shifters, front derailleur,