Originally Posted by gmason
This is an excerpt from Campa's initial info on the Ultra-Narrow chain ...
The Record™ groupset presents the Record™ 10s Ultra Narrow™ chain that is just 5.9-mm wide. Owing to its dimensions, it is lighter and quieter and facilitates adjustment of the rear derailleur.
I always have a problem getting all 10 sprockets to shift precisely after rear der adjustment.
No problem with KMC x10 and KMC x10sl - put off using my Chorus ultra narrow chain I bought as a spare when I got the bike until I can find a master link to use with it.
I initially had some chain skip on the 12cog but that's gone away - small ease off on high stop and some run in of the new x10sl chain apparently has taken care of it. Smooth and quiet now.