Funny my mention of liking to ride in during darkness yesterday. Today I was set to roll at my normal time (5:30) and noticed my tire bead had rolled out of the rim! (It was on the outside of the rim for about 4 inches). I knew it was off radially a bit but hadn't looked at it closely. Anyway, I had to bring the bike back in, let the air out, re-seat the tire and pump it back up which delayed me about 15 minutes. So I had to ride most of the way in the light.