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Whenever you increase the rolling diameter of a tie it will affect both mileage and towing, the bigger the diameter the more power it takes to turn it over so the mileage will go down along with the towing.
Denny
Yeah honestly with 4.30's if you increased your tire size and didn't increase weight much, you might actually get better highway mpg's. But you will usually lose mpg's when increasing size.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
