Has anyone ever heard of this? I'm not sure how it happened, but when i went to replace my tire today, I found that I had two stem lock nuts on my valve. One inside the rim and one in the normal place. Not sure if the shop did this for me a awhile back or if I did this absentmindedly last time i changed it... Anyway, it didn't cause any problems and I put at least a few hundred miles on it like that.
Any reason to do that? Thanks!