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Old 07-13-2005, 11:28 AM   #43
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CNC, IIRC is something like "computerized numerical control," and means that the computer is doing the actuating of machine work rather than either a person or an automated type of feed without feedback.

I was just reading that magnum size of earthmover tires, e.g., are hand laid into molds, such that a factory can produce only a few tires a day or less. Hand layup has got to be less accurate, hence my theory that if truck tires are not CNC tolerance in the manufacture that random internal weaknesses could be more prevalent than in passenger tires, and that they may progress over time.

BTW, Tom, what do you look for in R&R'ing a tire after a pothole soiree? Do you find pinch marks, ruptured interior skin, etc.?
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Old 07-13-2005, 08:37 PM   #44
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Mike,

Exactly that. Pinch marks may be visible as a small cut, sometimes an X, or discoloration, somewhat like bluing on the black liner.

Truck tire are measured up by machine with the belt packages, bead layup, ect measured by computer for a more uniform tire. Much like passenger.

Those earthmover tires are so tedious to build the prices are astronomical.

Mike be sure to post a picture of your new home!
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Old 07-14-2005, 05:58 AM   #45
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I have a 2005 38FDTS with the M120Z tires but in the 11R size. I have over 10K miles on the tires and have not noticed any of the outer rib wear that I experienced on my '99 model with the 295 tire size. Anyone else have similar experience?
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Old 07-15-2005, 09:01 PM   #46
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Dale - I have to confess, I didn't give the tires much thought. I have used Cooper tires on pick-ups for years and liked the way they performed. The 340As don't really seem to be any different than the originals...my coach has always handled well and I really can't tell any difference. The Coopers are all position. Sorry I don't have any quantitive, analytical comments but I am very satisfied with both tires.
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