Originally Posted by
kevmk81
Never would have thought to check that! Makes sense though. Wonder if the housing needs replaced anyways? I've had the same housing on since I bought the bike back in 2012.
Try lubing that loop going into the rear derailleur with some light oil. Also, don't forget to lube the cable guide under the bottom bracket. If it's dry the cable can actually cut into the housing causing a lot of friction. But you do put a lot of miles on so maybe a cable/housing replacement would be a good idea.