Upgrading Shimano Tiagra shifters I have a 2014 Opus with Shimano Tiagra 10 speed. I have seen Tiagra shifters which don't have this annoying cabling coming out of the shifter and instead, they are together with the brake cables which goes underneath the handlebar grip tape. Can anyone suggest me how to upgrade the necessary components of the shifters to get rid of these cables in the front? I presume I might be able to save some watts on higher speeds as these flaps a lot.
Newer versions of Tiagra brifters route the shift cable under the bar tape. Do be careful though because Shimano has changed their cable pull on some versions. The 4700 series Tiagra uses a cable pull ratio that is different from any other Shimano models. If you get 4700 brifters you would need to replace your derailleurs to be compatible.