Shimano Dura-Ace BC-9000 Brake Cable coated polymer grey

The Dura Ace is Shimano's lightest, most ergonomic and most precise component group ever. It not only offers the finest mechanical performance, but also serves as a chassis for the revolutionary digital Di2 shifting system. The additional 11th gear and numerous other improvements allow for truly dominant performance. With Dura Ace you win.

Polymer-Coated Cable
Polymer coating results in a smaller surface area that rubs against the inner casing cladding. Grease is also kept longer. The main advantages are a considerably lower effort required for shifting and the feeling of faster shifting operations, as well as more braking power with considerably less effort required at the brake lever.