My cassette won’t come off. It is on a trainer bike and I haven’t taken it off in honestly 6 years.
I have used ALL of my strength 
to get it out, but no luck!
Please show me the light.
Ciao,
geeze o pete’s i’ve got to get out of here. upon first glance i thought your thread said, “help rolling tight cigarette”…lol!!!
That, too.
hahaha…thumbs must touch the entire time, make sure your hands are dry…and you’ve got to pack it a little fuller in the middle and twist the tips. nice long burn this way.
Use a rubber mallet on the arm of the chain whip. If that doesn’t work, graduate to a small sledge, but be gentle. Work your way up to a full swing. Of course, should you need a full swing, it will be destroyed well before that.
Yeah, so I really try with all I’ve got and get it out. I am installing the new cassette and it is a 9 spd. It seems too big for the size of the hub body.
Turns out the old one was 8 spd. I thought those were interchangeable.
Well, no worries, thanks for the tip!
Felipe,
I’m not trying to be funny or demeaning but did you remove the cassette lock ring first?
They are interchangeable. There’s always a bit of an “overhang” of the cassette over the hub, but you’ll know pretty quick once you put the lockring back on. If it screws on, you’re ok, if not, you’re screwed!
Hopefully you greased the hub splines before putting on the new cassette!
Chris
Yes, I did remove the cassette lockring.
I think the problem is the new cassette I was trying to put on, as Ai tried a 9 spd, but different one, and it worked fine.
Thnaks in any case!
Some Dura Ace freehubs are not as compatible as the lower end Shimano freehubs. Also some Dura Ace freehubs are made from Aluminum and can be damaged by the cassettes. Extra care must be taken when changing cassettes on these wheels. Not sure from your description what you have.