Topic: new tires - alignment required?

[Troublemaker]

Worn in center means tire pressure was too high most of the time.
Worn on both edges about the same means tire pressure too low.
Drive it for awhile, then run your hand across them, if it feels rough in one direction but not the other, toe might be off.
Worn only on either inside or outsid eof tire, camber would be off.
If it wanders or doesn't straighten out by itself on a level road, could be caster.

They actually showed me the readout, and the front left tire (driver's side) was (allegedly) slightly off on toe, caster, AND camber...   but the passenger tire was OK.

With 50K miles (on 50K stock tires), I doubt anything was too far out of whack anyway.  They were just looking for an extra $80.