I guess i could of posted this in the XL area, but seems there isn't much action there so here goes here. I purchased a 2002 Yuk XL 2500 w/8.1 from a friend a few months ago. Great vehicle with 58,000 miles. When he bought the vehicle new, he had 22" (Oasis Edge) put on with 305/45/22 tires. Per Discount Tires, he bought a new set of tires in '05 which are what is on there now. Goodyear Fortera SL Edition. Load range: XL. I think there are around 29k on this set. The vehicle set idle about 4 days and when i went to get it Tuesday, the front left tire was low so i assumed a small leak and went to Discount. Nothing found but while there, the tire salesman said these type of tires shouldn't be on this 3/4 ton vehicle. Not made for it! Too heavy a vehicle for this type of tire. Now i'm confused. I like the look and want to keep it but don't want to take a chance. Two tires are showing tread wear and some dry rotting on the sides so getting close to making a change. Is this all true what i was told and should i go to an all terrean tire and lose the "look"? Alternatives if so? Sorry so long and hopefully someone can help. Thanks in advance.