Niro EX Replacement Rims and any effect on Mileage? - Page 3 - Kia Niro Forum
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post #21 of 21 (permalink) Old 10-24-2018, 09:46 PM
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Originally Posted by Nouseformonkeys View Post
How does the Niro TPMS decide if the tires are low on air? Is it doing it by rotational frequency of the wheels? The tire pressure display shows around 47 for each tire. Is that the psi? That seems to be a lot of it is. All my other cars are around lower to mid 30ís.
Cars destined overseas are filled with 50 plus psi to avoid flat spots from storage and shipping to destination. As part of dealer prep, they are supposed to be dropped to the recommended pressure before delivery but it is apparently an easy task to forget.

I'd drop it to the recommended pressure of 36 psi. Not much change in rolling resistance past that point (in the summer, 36 psi goes up to 40 psi driving at highway speeds), but noise and harshness increase, and tire life and handling decrease.

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