Originally Posted by
topflightpro
But use a lockring.
Not many things scarier when the cog comes loose from back pedaling out on a road with traffic and stop signs.
I've backed a cog on the track exactly once (I don't remember now if I forgot to put a lock-ring on or was in a rush and intentionally skipped it), and that was unsettling enough. Imagining it on the open road is pretty terrifying.