Quote:
Originally Posted by Ohio Maxima
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From the 1940s until around the 1980s, the 'X' rotation method was fairly standard, except for some radials of the 1960s thru 1980s. You can still use the 'X' method, except (as k757 mentioned) with directional tires, which are denoted with a small arrow on the sidewall, pointing in the only direction that tire should turn.
As to the treadware benefits of the 'X' method, as compared with switching just with tires on the same side, that may have been true at one time, but with a properly aligned modern car, I would not expect to see any real difference in treadwear.
I personally stopped using the 'X' method back in the 1960s, when doing so resulted in the internal failure of several radial tires on my car. Reversing the direction of rotation of a tire does put additional internal stresses on the tire, and today's non-directional tires supposedly can handle that. But I feel keeping the tire rotating in the same direction may still give my tires a slightly better chance of survival. Just my opinion.