Tire Pressure Question

Mar 25, 2019 | 02:21 AM

Carneyalonzo

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Tire Pressure Question

Hey, I just wanted to know what level of psi should I have on my 235/40/18 tires... currently from the tire installer they are set at 40... and Im guessin thats way to high... Driving Press - Stay Alive - Think and Drive

Last edited by Carneyalonzo; Nov 13, 2019 at 01:26 AM.

Mar 25, 2019 | 02:46 AM

BillyGR

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40psi cold is kinda high.
I would stick to 32psi.

Mar 25, 2019 | 10:46 AM

NotAPreppie

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From: 2017 Miata RF Launch Edition

That size isn't hugely different from OEM so the OEM pressure of 32 PSI all around is a good starting point. Adjust from there if you notice any funny wear or handling issues.

Mar 25, 2019 | 11:55 AM

Jedi54

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yup, somewhere in the 34 psi cold range is probably good.

Mar 27, 2019 | 02:01 AM

UnknownJinX

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40 is too high and your tires will wear more at the centre. Your handling will suffer as well.

Stock setting is 32 PSI and I personally just adjust it to be at 32~33 cold. This is assuming you have an accurate gauge.