Originally Posted by
HillRider
Interesting and I obviously haven't come across this type before. That must be one of the most recent 7-speed Shimano's and, indeed, there does appear to be a lockring but it's so thin I wonder if any hook spanner can get adequate purchase to remove it. An air hammer? How?
BTW, do the cogs all slip on and off like a cassette and are they unique to the freewheel or will they also fit on a freehub body?
Most of the ones I've seen have lockrings. Only older ones I've seen have a screw-on small cog.
I use a small air hammer, looks like this:
You can see the freewheel body is stepped, you can only use larger cogs on the big end and small ones on the small end.
And no, they don't fit on a freehub body. I turn the PSI down on the compressor and use the air hammer to remove the lockring, just give it a few bumps at a time until it starts moving.