Proper Pressure for Michelin PS4?

[4thPcar]

I have the MY 2022 base with 285/40R20's and am confused with by all the different sources. Car's label says 35F/38R. ChatGPT says 35F/33R. Guy at Discount Tire said all the Taycans he sees are requiring over 40! I know that Porsche puts out an online link with updated info on recommended tire pressure but I don't know how to find it.

Any help?

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[Tooney]

Look it up in the manual in PCM, and/or
https://static.nhtsa.gov/odi/tsbs/2026/MC-11027133-0001.pdf
(From list of all Taycan TSBs by @rs38 here: https://ti-list.azurewebsites.net/ )

 

[4thPcar]

Look it up in the manual in PCM, and/or
https://static.nhtsa.gov/odi/tsbs/2026/MC-11027133-0001.pdf
(From list of all Taycan TSBs by @rs38 here: https://ti-list.azurewebsites.net/ )

That's the link I lost! Thank you And score one for ChatGPT. It was the only one to nail the right answer.

 

[tigerbalm]

The manual generally says that the door label overrides anything in the manual. It has been created with reference to the specific options on your particular vehicle at manufacture.

 

[4thPcar]

oh I didnt know that and that makes a lot of sense. thank u

 

[Tooney]

The manual generally says that the door label overrides anything in the manual. It has been created with reference to the specific options on your particular vehicle at manufacture.

I looked at online manual for 2022 and do not see anything about door tag overriding tire pressures in the manual.

 

[4thPcar]

Unless I missed a second tag, the tag on door frame of my US 2022 4S has VIN and vehicle weights only, nothing about tire pressures. I looked at online manual for 2022 and do not see anything about door tag overriding tire pressures in the manual.

It's ridiculous something so important is so difficult to pin down, am I right? This is what I see on my frame. It contradicts the online manual, ChatGPT, and what the guy at Discount Tire told me. On another forum I believe I read the online manual OVERIDES the car's spec plate because they are always looking to update with the best information. What to believe??

This is a 2022 base model. No frills.

 

[Tooney]

It's ridiculous something so important is so difficult to pin down, am I right? This is what I see on my frame. It contradicts the online manual, ChatGPT, and what the guy at Discount Tire told me. On another forum I believe I read the online manual OVERIDES the car's spec plate because they are always looking to update with the best information. What to believe??

This is a 2022 base model. No frills.

My car does have a similar tag. Tire pressures on the tag slightly different than the manual. I use the manual.

 

[SoccerMan94043]

The manuals aren't updated often either. Use the TSBs.

 

[Crick]

What to believe?

"Use the inflation pressure on the label to the right. For better driving comfort, the tire pressures in the owner's manual may be used."

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