I put 31" swampers on my 88 Bronco. Rubbed a little bit though. You'll fit bigger ones if you lift it a few inches. 2" lift will fit 33's, 8" 39.5's
Good luck.
The only size I can find is for a 1988 Ford Bronco II Eddie Bauer: 205 75 15.
Stock tires on the Bronco are 31x10.5 R15 with stock rims.
235 75R 15
30x275x15 is the absolute highest anything else rub like crazy
largest size recommended is 31 - 10.5 - r15 31" tall 10.5" wide 15" rim
The original tire size is 155/80R-13
The factory size is: 225/70-15
13
Stock Tire Size 215/75-15
235/75R15
25"
205/75R15