I'm new to the forum and have a question about my "99 F250. I've lifted the front 1-1/2" with add-a-leaf. How big a tirewill fit without rubbing?

My buddy had a '98 F250 and 35 12.50's were decent @ factoryheight. After we installed a 4" lift he swapped to a 16" wheel he ran 285's I think. Kinda depends on whether yer playin' or truckin' with it, gas prices bein' what they are....