Same diameter? Wow!So on this point, the need for extra gasoline.... I made an accidental discovery this summer. My TJR with a 19 gallon tank averaged 17mpg, a 300 mile range at best. Then I changed from 33x10.50s to 7.50R16s and I now get 22mpg easy, a 400 mile range. A change of tires gets me an extra 100 miles.
I'm never going back.
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