What's the most annoying thing about riding your bike? Well yeah, the saddles sore, but what else? OK, I agree, the tan lines are stupid, but what else? Yeah, chain rub! With the Shimano Dura-Ace 9070 Di2 Front Derailleur, you'll never have to hear that grating sound again. There are miniature robots in the front derailleur that watch the rear one to see what gear you're in. If you get close to having the chain rub, they give the front derailleur a little kick to adjust it, so you'll never have to deal with it again. The 9070 Di2 Front Derailleur is worth it just for that, but it also features smooth, fast, accurate shifts every time - even if you're mashing on the pedals while climbing. It's amazing. So...what are you waiting for?!
Fast, precise, smooth shifting
Works with E-tube Di2 systems