I currently have 15x10s I think..they came used already mounted on 38s with a 4 inch backspace. the tie rods hit the inner lip wheel weights just enough to rub half of them off. my buddy has the same axle and his clear fine? ive never had the tires dismounted to properly measure them I guess theres a possibility they could be 12s . im hoping the 16s give me that little bit of clearance im looking for to get the wheels away from hard parts