I'm thinking about getting new wheels, not sure what type yet, but probably some type of cobra wheel either 9" all the way around or 10.5" on the rear with 9" on the front. I would like some help on which tire size most people run with either of these combos and which combo looks the best or should I go skinnier on the front wheels with the 10.5" wheels on the rear like people do with weld wheels? I currently have 245/245 zr17's on. I have noticed some run 275/40 17's what is the main difference in these 2 tires?