Hello - I was replacing my rear cassette and chain today. When I got the old cassette off, I tried to twist what I will call the axle. I don't know if that's what it's called. The thing that goes into the hub? It has two different sized bolts on each side of the wheel.
Anyway, when I twisted it it was pretty tight. I could turn it with my fingers, but it did not turn easily. It would catch a bit with each quarter turn. Is that norma? Should it turn easily? Should it turn at all? If it's broken, is there something I can do to fix it? Thanks for any advice.