alexnharvey wrote:...I do find chain whips a bloody PITA. Why don't they have a hook or something that would secure the loose end and stop it slipping off.
It isn't difficult to add such a thing if you want one.
IME the two big problems with chain whips are that
1) the loads are rarely confined to a single plane (i.e. the thing almost always manages to twist slightly) and
2) the load on the chain is about twice as much as it could be.
A 'double-handled chainwhip' could exert twice the torque for any given peak chain tension, and if it was designed right, it wouldn't twist out of plane either. Manufacturing such a thing is on my 'to do' list.
FWIW if the lockring is tight, it may be possible to jar it by giving it a few well-aimed hammer blows in the axial direction. If you really can't shift it, you can cut one of the plastic sprocket spacers in situ, ease the pressure and release it that way.