The 70’s are 32.8” and the 75 is 33.8. So basically a 33 vs a 34. The factory BFG’s are E rated and weigh-in at 56lbs vs the C rated 70 at 57 and the E rated at 61-63lbs each. I personally would go with the E rated for the 10 ply construction and higher load capacity. I am likely going to go with the 285/70/17 E rated unless I can confirm no rubbing on the 75’s.
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