Replaced the original 105 brifters with new versions that route cables on the handlebars. Shifting was basically OK but not what i expected from new equipment. Replaced the cables and housings with this package. Huge improvement.
What a difference these cables made in shifting performance. Easy to install and a good price. I have a set on my other bike thats been on for almost 2 years with a lot of miles and still shifting good.
This is a very slick shift cable to use. Installation is easy and the cable is a very smooth and slippery in the cable housing. I did not install this in the 9000 or 6800 (installed on 7900). I was very careful and scraped the coating off the cable where it is clamped in with the fixing bolt, paranoid of cable clamp slippage. Not cheap, but a very smooth and slick cable.