Originally Posted by
bboy314
Agreed, wrong chain is probably not the culprit. When you say 10th gear, do you mean easiest or hardest gear? If hardest, it’s likely your smallest freewheel cog is worn, or rear derailleur high limit needs a slight adjustment.
Yes, it is the smallest cog in the cassette, and it does look more worn than the others. I was thinking along those line myself. When I think about it, I do spend more time in 10th gear (the hardest) when on a flat when I have my pedal speed going where I like it. I was thinking that the cassette needs replacing.