[roastpuff]

Well the whole point of the tire rotation thing is to get them to wear evenly - which is why they recommend people to do it every 10,000km or whatever it is in the guide book. I think that if your tires are wearing unevenly every 10,000km such as that you have a large discrepancy between the front and the back, there is something else wrong. Let's say 6.5/32nds and 7/32nds, that's not a large discrepancy that would affect the handling a lot, but a new set of 10/32nds and an old 5/32nds set of tires will behave differently.

A lot of people don't rotate their tires, like my FIL - I always tell him to rotate, and I offer to do it for him, but he won't do it/let me do it.

This is talking about the average all-season tire, not sticky performance rubber which wears faster etc.

As for a daily street car, have you seen some of the drivers around recently? With the way they weave between cars on the highway at 120+ kph in the wet, grip starts to matter with these crazy drivers pushing the limits on their Civic/Corolla/Elantras or whatever. I've also seen people spin out on an on-ramp in the wet at 50kph because they have crap tires or just don't know how to handle a car.