2005 suzuki forenza tire wear

i take care of about 20 vehicles, including a couple 2005 suzuki forenzas, one wagon, one sedan, and have definitely noticed excessive tire wear on both of these. sometimes front sometimes rear. the web has a fair amount of stuff about problems with the aerio and tire wear but i have seen a bit about the forenza also; anybody else out there finding this problem and are there fixes? no tsb’s on this as far as i can find, with the aerio the rear toe in spec was published wrong i believe, maybe the same thing with this car.