I have a 2011 Chevy Silverado. I have 285/65R18 on it now. i was wondering would a 33/13.50R18 fit on it without rubbing. I have a 2 inch rough country leveling kit on my truck also. It says on the internet that this size tire is actually 325/60R18

 

I have an 08 with 6" lift and 35/12.50/20 and they still rub on a turn. I would say 305's would be pushing it for rubbing. I took that lower air dam off as well and zip tied front lower fender lining back some to get a little clearance. Just drill two small holes and run zip tie thru to a front anchor point and pull back. I know that I removed front mud flaps also. Prior to my 6" lift I ran 285/60/18 with a leveling kit and believed it would of handled the 305's.

Hope it helps I'll try to post ya some pics or send me your email and I'll send them directly to ya.

Brian

 

on stock rims a 33x13.5x18 may fit with the levelin kit. maybe. If not I'd get a topguncustomz 1 inch levelin kit to go with the 2 that you've got and maybe a 1.25" body lift to clear them for sure