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Old 10-25-2022, 10:47 PM   #4 (permalink)
JSH
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Larger diameter tires have lower rolling resistance than smaller diameter tires.

Web quote: Tires with a smaller diameter have a higher rolling resistance with the same inflation pressure, because tire deformation is proportionally greater. The tire is flattened more and is “less round”.

This is one of the reasons why giant wheels / tires are all the range on EVs. This is why BMW had special skinny 19" tires made for the i3.


However larger wheel / tire combos tend to be heavier which increases rotational mass and consumes more fuel when accelerating - which hurts city mileage. As with everything there are tradeoffs.
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