We love the reliability, customization, and shifting precision offered by a wired Di2 setup. Every once in a while during a bike build or gruppo swap between frames, we'll run into a Di2 wire that comes up just a little too short. The EW-JC200 is a female-to-female junction box that allows...

Available in three separate lengths for your exact frame needs, the Shimano E-Tube Di2 Y-Split Rooting connects your Di2's battery to the front and rear derailleurs. This E-Tube Y-Split Rooting is compatible with all previous Di2 drivetrain generations, regardless if they're Ultegra or Dura-Ace....

This EW-AD305 Conversion Adaptor allows for the connection of SD300 electric wires to the SD50 wire system, allowing the different e-tube interfaces to interact with each other.

The EC-300 Di2 Charging Cable is the updated charging cable for Shimano's 12-speed Di2 road drivetrains. It also works with the Dura-Ace R9200 power meter crankset, keeping our entire system charged via one cable that costs less than previous Di2 chargers.

When building our dream bike, we don't want to worry about shifter battery life down the road. The Shimano EW-JC304 Di2 4-Port Junction allows us to connect both shifters directly to the battery for 50% more battery life.

The EW-SS302 Speed Sensor is for e-road bikes with flat-mount brakes and the Shimano EP800 drive unit. It provides accurate speed measurements when paired with Shimano's magnet lockring for centerlock rotors.

The SM-BTC1 Di2 Bottle Cage Battery Mount is a convenient way to integrate an externally-mounted Di2 battery onto your fame. The SM-BTC1 mounts on your frame's water bottle cage bosses, and is designed to hold our Shimano BT-DN110 battery. It's got six E-Tube wiring ports, and it keeps things...

Whether we're mounting them on the tops or down in the drops, the Shimano SW-RS801 Shift Switch gives us multiple shifting points for our Shimano 12-speed Di2 drivetrains. This lets us focus on the road ahead without needing to reposition our hands for every shift, saving us crucial seconds in...

Over time derailleur pulleys will wear out, even if the derailleur itself is perfectly fine. Usually it comes down to the bearings going bad, the pulley teeth wearing out, or maybe both. If your bearings are feeling notchy, or the pulley teeth have rounded out, it's in your best interest to...

SHIMANO SM-GM02 oval rubber grommets secure internally routed E-TUBE wires as they enter the bicycle frame.