Originally Posted by
Moose
Rotafix works, but it is not the end-all/be-all procedure for removing/installing a track cog. A good mechanic can break any cog loose with a good chainwhip and proper leverage applied and there's less risk of scratching up your frame than with the rotafix method.
+1
Got to get a good whip though. I once bought a flimsy Park model. I think it was designed for holding cassettes while removing lockrings, not for fixed cogs.
I find it helpfull to wear gloves and to have the wheel rolled against a wall while on the floor. If that fails I put the whip in a vise.