Originally Posted by
hairnet
It seems that way, but it can work. I recently switched out my 19 cog and it would not come off; I tried, skidding, backpedaling, a chainwhip, and rotafix. I finally went over to the lbs because I needed a second guy to hold the wheel while I used a chainwhip + pipe extension. Maybe if I rode on it long enough the repetative back pressure could loosen it up, but maybe over many miles.
I can only guess it was so tight from taking the bike on some long climbs around here.
When I install mine, the process is to clean/grease the threads, install, uninstall, clean/re-grease in case of any contaminants, then reinstall and torque. I figure that any foreign matter on the threads gets removed that way, and it's got fresh, clean grease in there. This would be for new hubs/cogs, or if they've been sitting around a while. I like things to come apart easily, but only when they're supposed to.