Shimano Ultegra Sd50 Gear Wire Review

Be extremely careful when measuring for a near perfect fit, neither too short nor too long. Internal cables give you more wiggle room than external ones.

Easy to plug in and use once you get the hang of it. Excellent functionality, and the best part is that it doesn't matter what you connect to what - everything is recognized and works as expected.

I have Shimano Di2, you need these cables. They're expensive for what they are. The connectors are sturdy and stay connected well so I never have any issues with the 7 wires I have on each bike. If you think about it, at $25 per cable, it costs almost $200 to install a bike just for the Di2 cables.