I was reacting to notnew2diy's post where both passenger side tires blew, so they switched an existing tire from the drivers side to the passengers side.
Im no expert on tires. My 07 Sierra, oil @ 10K, tire rotation same time. I always X all 4. Only problem I ever had was on a General tire. Local, trusted, repair guy said the tire was out of balance about 6ozs. I could only run that tire on rear pass.
Dealer said, on a normal 4 tire rotation...
...rears get moved to the front, remains on same side.
...fronts get X'ed to the rears.
...rear driver did not move
...front driver to rear pass
...2 new front tires.
I've driven it once since the switch. I noticed nothing, but really do not drive it much. Wife has not complained.
We'll see what happens...notnew...