[Kahlis]

Factory spec tires are 245/45/20 on 20x8s and 275/40/20 on 20x9s.

I don't foresee a problem with keeping the front tires stock (but on 20x8.5) and the rears 305/35/20 on a 20x10. I would think GM wouldn't have made the 20s so tight I couldn't play with a lousy inch. I guess my question is can I get a 305/35/20 on a 20x10 and still get it to fit without the rears sticking out too far? I really do hate that look,...

And how noticeable will the different between 45 and 35 series tires?