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My turbo has different size tires.

Front:  255/40 20"

Rear 295/35 20"


Car is set for partial pressure, standard, faster than 100mph, summer tires.

What you you folks set these tire pressure at?


The sticker at side of the door frame driver side, states partial pressure should be 44psi in both front and rear.

The multi function display shows that for cold tires to be filled right (per above settings), fronts have to be inflated to 44psi, rears inflated to 38psi.

This way fill info shows 0mpsi needed  in tires.


Max tire pressure is 49psi, so I am starting to think 44psi may be high.

Also, is there a way to reset the display to show full pressure at differently set levels from the 38/44 psi?


Wanted to hear advice on how to set thgem right.


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Looks like the Porsche system is temp compensated too.  I calculated pressures at 68F, then at 95, and it appears that the calibration on TPMS takes account ambient temp, which is good.

In addition, Porsche has stated their pressusre measurements are very, very accurate and would trust them over any gauge.  

So what I think I will do, is run at the settings or F38psi/R44psi, and trust the technology more.

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