I'm putting 315-16 MTR's (35's) on my Ranger. I'll be using 8X16" crawler wheels. I have 5" lift and some trimming. What offset/back spacing should I use? I think the standard offset is 4" or 4 1/2", this should work, but I'm not sure. I only want to buy wheels one time.

The 4" should work good (most run 3.75", although I don't think there are many 16" wheels with that amount).