SHIMANO Di2 M-EW90-A JUNCTION 3 PORT Bottom Bracket & Pedals Tools Valve: Reversible head - Presta

Valve: Reversible head - Presta and Schrader

Reversible for additional clearance

Reversible valve insert for all valves

it delivers exceptional modulation and stopping power with intuitive feel

SHIMANO Di2 M-EW90-A JUNCTION 3 PORT Bottom Bracket & Pedals Tools Valve: Reversible head - PrestaThe 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,