Wow! Not to my knowledge. Racing quick starts are so thin in the tread area that they usually give you notice when they are about to blow out. I've got two pair (same with hoods, gloves, socks, etc.) just in case, but I never knew that shoes had an expiration date. I don't think there's anything in the GCR about it...just belts and helmets. Keep it quiet, though. Someone might get the idea to include it in the rules. :026: