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I have a bit of confusion regarding the correct tire pressure settings on my MY08 Cayenne S. I am currently running Porsche OEM 20" summer tires. I have found that door sticker recommends front and rear air pressure at value X and the TPMS setup screen recommends value Y. Which is the correct? I am currently running the TPMS recommended values. Thanks for your assistance. Andrew

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I have a bit of confusion regarding the correct tire pressure settings on my MY08 Cayenne S. I am currently running Porsche OEM 20" summer tires. I have found that door sticker recommends front and rear air pressure at value X and the TPMS setup screen recommends value Y. Which is the correct? I am currently running the TPMS recommended values. Thanks for your assistance. Andrew

I was told by the dealer to use the door sticker recommended air pressure on my '08 Cayenne S. I have 19" wheels and am running 39 PSI front and 49 PSI rear and got just over 30K miles on the original all season Continental tires. The car isn't here right now, so I don't know if it's different for the 20" tires. I've never used the TPMS setup screen, but do periodically monitor the pressure on the TPMS display (and double check with a real tire pressure gauge)

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