Need help with tire size

[karbate]

I'm planning to buy 20x8.5 +30 fronts and 20x10 +48 rears and what I have in mind is
255/35/20 for the fronts and 285/35/20 for the rears, would that clear? I'm lowered on Steeda Progressive Sports.
Can I run 305/35/20 on the rears lowered without rubbing or do I need a little camber?

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[MidwayJ]

What you are proposing with the 255/35s and 285/35s should be fine. The 305s are pretty wide for only a 10 inch wheel but I know some do it. If you do go with the 305 I would do a 305/30 instead of 305/35. The 305/35 would be way taller than the 255/35 in front and could possibly present rubbing issues on the lowered car. One other potential negative is more understeer in handling with 305s in back and only 255 in front.