This cable system is honestly amazing, shifting modulation is better now than when the bike came new with Jag wire cables. The polymer coating ensures extremely smooth lever movement. These cables are so slick that If you use these on the braking system it's recommended you scrape off the polymer coating where the cable anchors to the brake caliper fixing bolt as it's so slick it can slide past the fixing bolt, that’s how slick it is.
|The Ultegra version of the polymer cables|
|You can see the actual polymer coating on the cables.|
The redish coating can be scraped off where the brake anchor
clamps down as to prevent the cable from slipping loose.