My bad

in the old set, it's very obvious the looser pulley is the top one in the setup. However, with the new set of pulleys, they appear to be interchangeable. Maybe I missed something....maybe I got a wrong set of pulleys? Maybe I need to wear better glasses when doing something like this...Hmmm...this may turn out to be a "D'oh!!" moment for me

I'll go back and recheck the new ones (wasn't obvious when I did the replacement). Worst case, guess I can put back on the old ones until I can figure out what may have happened.
You did confirm that there is 1 pulley with at least a bit of play. Thanks.
Cheers...Steph
Originally Posted by
Dan The Man
Sounds like the pulleys (cogs) might have been installed in the wrong location. The top one is supposed to be looser so as to have enough play to let the chain drop into the closest gear even if the derailleur isn't spot on, because it's never really perfectly aligned with the cassette.