Great posts Denise and Yellow. Thanks! I had been pretty good about checking the air on my tires, but with recent traveling I forgot. As I posted on Saturday - I went out and felt lousy, realized my tire pressure was low and came back and pumped up the tires to 110. I don't know if riding on them low caused damage or not, but the rear tube blew (with quite a bang) later that afternoon. I will not make the same mistake twice and will check my tire pressure before each ride.

Thanks again!