/ Stuck lock ring
Assuming you have the right tools...
Have you tried a longer lever on the spanner that you're using on the cassette tool?
Make sure you use the QR to hold the cassette tool in place as a slip here could be ugly.
Getting someone else to hold the wheel and chain whip will also help.
Have the right bits, tried the QR thing and using a foot long spanner. Don't really have anything I can clamp the wheel in or anyone to hold it.
Sadly no blow torch either. Surprised cutting a slot all the way through it has made no difference (old cassette is knackered so don't mind trashing it).
Lock ring that's stuck
You knows it! Choccy biscuits are absolutely the right currency for this sort of job
Sometimes a different cassette tool help. I have 2 shimano compatible cassette tools, one for each shimano outfitted bikes (both 10 speeds). One works well on one bike, but poorly on the other and vise versa. Why? no idea...
> Have the right bits, tried the QR thing and using a foot long spanner. Don't really have anything I can clamp the wheel in or anyone to hold it.
a few twacks with a hammer first would help
Holding the wheel will do nothing, the cassette will just spin.
Position the chain whip and spanner at the 3 and 9 o'clock positions (clamping the lockring tool as others have said is a good idea here) then lift the wheel and smack it on the ground (repeatedly if necessary). This usually works for stubborn lockrings.
Where did you cut the slot? Can't envision how you would reach the threaded part of the lockring without taking the axle out.
Once you have exhausted all the other possibilities, depending on the model of hub you could always just take the entire freehub off and put a new one on.
You'll probably have to sacrifice the free hub if the lock ring is rusted on and won't come off.
Unless you carefully grind away enough of the lock ring to let you take the cassette off I suppose ---> side onto the cassette, then set about cleaning the threads /getting to work on removing the metal still rusted on.
Just off the top of my head though.
diagonally inwards so that I can cut all the way into it without hitting the axle - i.e. draw a line horizontally outwards from the top of the axle cylinder. Going to hack another one into it tomorrow and see if I can cut out a whole wedge of the lock ring (and smallest sprocket).
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