ok guys i have a question about tires so here is what i have. i have a 1997 f250 diesel crewcab my factory tire size is 235/8516 i am running 245/7516 and im wanting to run a 265/7516. with my 245s im averging 15 miles to the gal and was wanting to know if i run a 265 how bad will my mileage be? someone told me that the 265 is the same tire size as a 235 just wider is there any truth to this
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