Shimano EW-JC302 Di2 Junction Box - 2 Ports, Use With EW-SD300 Default:Default ABP rear suspension

ABP rear suspension

Drivetrain: Shimano GRX RX-600

46/33 chainring combination

Shimano Acera M361 Chain Guard

Spring Type: Air

Shimano EW-JC302 Di2 Junction Box - 2 Ports, Use With EW-SD300 Default:Default ABP rear suspensionShimano Di2 Frame Junction Box Frame Junction Box connects via SD50 E tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com