I was looking at tires to be mounted to a 17" or 18" wheel that is probably 7-8" in diameter. The ET Street Radials I am looking at say that the approved wheel width for the 28x11.5x18 is like 9.5-11.5", and then the approved wheel width for another size (27x10.5x18) of the same style tires is 9.0-10.0". If I use the first style, will they even fit onto my rim? I mean I am running 28x11.5 slicks on my stock 16" wheels.. would I have a problem with the other ones?