I just purchased a set of interco iroks and I love them. But the rubber didn't look fresh at all so I did some research and found out that my tires were manufactured in week 20 of year 2002. They are around 9 years old. Will they where out faster? I did notice that after the first use they aready started chunking. Should I request that I get them replaced or a discount or some kind of refund or am I completely ok? BTW I bought these tires yesterday and wheeled with them for the first time today.