Originally Posted by
techsensei
If it genuinely is a freewheel, a cassette lockring tool wouldn't fit, not without removing the axle.
If the lockring is that tight, just put a length of pipe over the wrench to give you more leverage. I've very rarely had to resort to that, but when I have done it, it always works.
We had one of those the other day. It took 2 of us, and a piece of pipe on both the chain whip, and the tool. We sat on the floor to fight it, and my mantra to the other guy was " don't get hurt". Our 4' pipe is named Bertha, and never loses the battle. And they CAN be that tight, especially if really cranked on years ago.