I never leave the rings on...i have had the valves tear away from the tiube after riding some particularly rough roads. I had about 3 different occasion when I would develop a slow leak and not know where I got it, unitl I saw that every one of them was because the valve had ripped away from the tube. I stopped leaving the rings on and that hasn't happened since. Of course I was a dumba$$ and used to tighten them arond the base of the valve....served me right
Cheers,
Brian
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“A good teacher protects his pupils from his own influence. ”
― Bruce Lee