I wonder if that's all tire manufacture hype?? Kinda like helmet hype about replacing them over 5 years old.... Helps sell tires and helmets?? I rode a rear EII that was on the '83VR to Ft Collins and back, and it was at least 15 years old. I thought about replacing it before the trip because the tread looked a little thin, but after posting pics here on the board the general consensus was Run 'Em... The front had an Avon Venom, and it also did fine...this time... These MC tires are built to take a beating, and I don't think a few years storage, even with a 5+ date, is going to hurt them any.