Quote:
Originally Posted by JSH
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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then why does the ioniq with 15 inch tires get better highway mpg than the 17 inch trims?
also wayne at cleanmpg even did tests and showed that smaller tires make a huge difference in mpg across the board
bigger tires are for better performance and '' looks''. remember, people are hesitant to switching to evs because of the styling factor. thats how tesla took off. they made the first ev that didnt look sissy and weak and cheesy. they made a stylish ev with good long range. no one wouldve bought a 15 inch tire tesla if it meant longer range