i was having an unusual problem, with my chain coming off the rear derailleur's lower jockey wheel when I shifted from the large to the small front chain ring. I suspected worn out jockey wheels, but was not sure of my diagnosis. Replacement Red jockey wheels run around $130.00, a lot more than I wanted to pay on a hunch. I decided to try the Force level and make sure a new set would make the difference and get the Red set if the problem was sovled.
These have fixed my shifting problem with no percevable diffrence in performance. I don't see any reason to switch up to the red jockey wheels, especily if I am going through them in a couple of years.
