I agree with NEO, you can have a tire shop do it. If you have a Firestone service center near you, check into the lifetime alignment. I am going to get one from them so I can go back every time I wheel and get it checked for free
As far as going from 265's to 285's, not sure. I think it only has to do with stock or not. I stayed with 285's but a different brand and that was why they wouldn't do the alignment.
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I don't care about the "Jeep thing"

as long as my mail is on time!!!
Slate Blue H3 Adventure w/sunroof, Monsoon/NAV, DVD and marker lights