I've been running with -1.2 front and 1.0 rear (started with Pettit's recommended settings) with 225/50/16 street tires and a couple track days a year. I've been happy with the handling and wear, and the tire temps have been fairly consistent across the tread. I'm going to 245/45/16 and I'm wondering if I should go more positive camber with the wider tires or just leave it alone?

 

I have not noticed any need for alignment difference between 225/50/16 and 245/45/16 if the tires are of the same model. If you're changing size AND model (like from a Hoosier to a Kumho or something) then most likely you will need an alignment change because the different tire will like different settings.

 

Make it like this...