[yticolev]

30 years ago, a left right movement was standard in addition to front rear movement in turn, which did mean dismounting the tires and remounting them every second rotation to preserve tire direction. Forty years ago, no one bothered with tire direction except for the then radical Michelin radials. Now US tire stores refuse to do that, perhaps because of the labor cost, but swear that it is for technical reasons. Doesn't make sense to me, but I no longer insist.

When I bought my car, I went to my tire store and bought road hazard warranty and lifetime rotation (presumably only front to back). Inexpensive at about $70. When tread depth gets too low, they will stop rotating them (or even adjusting air pressure).