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113 Posts
has anyone here (preferably with an automatic) ever noticed better highway mileage after swapping to larger tires? i do a lot of highway driving every day for work and im at 3000rpm at around 70 and i think if i swap on my 285's it might lower my highway rpms a bit and help save me a little fuel. i know the tires are a bit wider and heavier but i dont know how badly that will affect my mpg's compared to lowering my rpm's.