Originally Posted by
mashedpaters
The guy at the shop said backpedaling and skidding over time can do that, do you think he was covering his @ss? the cog did come off a few days after having the shop install a new cog.
You are aware that you should regularly check to make sure that ALL bolts are secure because the are ALL subject to coming loose, right? You are using your bike in a manner for which it was not intended, therefore you need to check more often.
Rotafix and Locktite are terribly bad ideas. They can be a pain in the butt to "undo" and at worst, permanently set the cog to the hub or even damage it.
Learn how to properly use a lockring and a lockring tool.