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My aluminum wheels were 40lbs heavier for the set. Going lighter on the wheels/tires made my pig handling van notably better and I gained 2mpg. I gained another 1mpg from removing the roof rack and rubber skids.
I will have some new advise coming soon as it looks like I am going to buy an engineering paper on aero related mods for brick shaped vehicles. I don't expect it to make an Earth shattering difference. But I'm hoping for another 1mpg.
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