Something to be aware of is the date that the tire was manufactured, which is shown by week and year. Example, 345, meams 34th week of 2005. A tire starts to deteriorate from the date it was made. It is recommended that ST tires be replaced 3 years from date of manufactured and LT tires be replaced 6 years from date of manufactured. My source of information are from Consumer Reports, segment on the Today Show and a recent article in the newspaper. Some tires were known to be as much as 8 years old when they were sold at new prices. So it is possible that an XPS Rib can go bad from the start.
Heres a link to the story about old tires being sold as new--
Aged Tires Sold as 'New' by Big Retailers
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