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I have a vehicle that came standard with 16" wheels but now has older 15" wheels. What if any difference will be in fuel economy because of this?

Asked by woodcutter (16377points) July 25th, 2010

It’s a 2001Dodge pickup long wide with the V-6 magnum. At some point in its life it ended up with 15 ” wheels. I’m running LT235–75R15 that the dealer popped for (new). The factory had P 225 75R16XL.

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