18's, 33's, stock 99 4wd

[dj_mindframe_99]

can I run an 18 inch wheel with 33 inch tires on stock 99 EB AWD ride height?

I have no running boards.

Am I limited to a certain backspace on the wheel?
Am I limited to a certain width on my tire?

I think that would be a killer combo on my Expedition.

I'm thinking something like a 305/60/18 or a 33/12.50/18 on a 9 or 10 inch wide wheel.

 

[panda24619]

if your going aftermarket ive been told a 4"bs is required. but im not 100% sure. theres a guy named wandell on f150online and he knows everything you will ever need to know about wheels and tires.