I need to purchase a new set of tire for the 85. Currently I have 15 inch rims with 205/65/15. (I have no idea why they were this size to begin with.) I would like to keep the 15 inch rims but am curious as to what other size option I might have (with the 15 inch rims). Also, I would like to keep all four tires the same size. I am still running the original open rear with a TH400. I am planning on upgrading to a posi in the near future, but I really need tires soon. I hope this falls under Trans and Drive line topics. Any advise would be greatly appreciated.