I’ve used Nokon cables on my TT bike. But the cable outers did rattle a lot inside handlebars and inside the aero extensions to the point of being a serious annoyance and distraction.

I overcame this by using standard plastic casing outers for the sections inside any bars and simply joining the segmented bits after exiting the bars (if that makes sense). They join together easily and without any problem. Just remember to use a cable end piece at the end of the standard outer where it will meet with the nokon (or other segmented) section. If you wanted to run the segmented sections inside any bars (carbon or alloy) I would recommend wrapping plastic around any potential contact points such as the point of exit.

I hope that helps.

Gerry