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Tires question

Discussion in 'Gen 4 Prius Technical Discussion' started by Oh4Corolla, Dec 11, 2020.

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jdenenberg EE Professor

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Trumbull, CT

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2020 Prius

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LE AWD-e

alanclarkeau said: ↑

You WON'T use 51 on a PRIUS!!!

The figure on the sidewall is what the tyre is rated at for MAX - definitely not what you drive with. That figure is what it's designed not to blow-out at - but using that pressure on a PRIUS would be unsafe. Just ignore that figure - it's always much higher than what you'd drive at.

Look up the CAR Manufacturer's recommended Tyre Pressure Placard - it's on the door opening on most cars (glovebox lid on one I had). It's also in your HANDBOOK.

Some cars have different front/rear pressures - if you're going to over-inflate by 2 or 3 PSI like some people might suggest - maintain any F/R differential. Pressure differential can affect handling (more FRONT can cause it to oversteer, maybe dangerously; and vice-versa).
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Alan,

The reason to prefer a tire rated at 51 max PSI is that it is a stronger tire than one rated at 44 max PSI.

JeffD

#21 jdenenberg, Dec 28, 2020

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