Just swapped the Ultegra 11 Speed chain to the new KMC X11SL chain and boy is the KMC really quiet and smooth. Saved about 20g weight over the Ultegra HG701. 2 rides (150km) over the weekend and it came in as solid as the HG701 outgoing chain. Kinda like the Gold colored chain which added some bling to the SLR6.
