I may be the only one interested in this thread but, for the record, my GM dealer received the above tires yesterday. They were manufactured in the U. S. during the first week of April, 2007 - so they are indeed a new product. On first impression, they're virtually identical to the steering tires that you would see on a commercial tractor-trailer rig. They are at least 50% heavier, by weight, than my old Goodyear Wranglers - and I was surprised to find that they can be "re-grooved" to a depth of 1/3 inch when the initial tread is worn down. After installation, my initial driving test revealed a quieter ride - due to the absense of the "scalping" growl that was associated with the Wranglers - but they definitely feel "stiffer." Not an unpleasant ride by any means - but a little more truck-like. My price, before taxes and balancing, was $211.00/ea. - although I had other quotes as high as $269.00. I hope that this solves my tire problem.
2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074