mkirsch wrote:
How many sets of fronts did you go through with the same set of rears, though? Two? Three?
Now you've got four tires with tons of wear left in them, but have aged out and need to be replaced!
So instead of rotating and only needing 6 tires, you've bought 8, or possibly 10 tires total, AND had to discard four tires with tons of tread on them.
The whole premise of your argument is that tire rotation is only to compensate for alignment issues, but it isn't. You yourself have admitted that the fronts wear more quickly than the rears. Doesn't it make sense to spread the wear across all six tires and replace them all with fresh rubber at once?
The only way to make front tires on a dually last same as rears would be move front to rear. And if you put fronts side by each on rear axle, the smaller tire put more stress on the differential gears. If front tires are wearing even a little faster than the rear, and you rotate so that tire is mounted dual next to a less worn tire, which will be a slight bit taller will cause the more worn tire to wear much, much faster.