Tyre pressure - what are you running and why?

[Karl]

Context : UK 4S, 20inch 4S wheels with Summer tyres (Bridgestone), air suspension

Just wondering what tyre pressures you guys are running with and why.

My car was delivered with 33psi all round at beginning of December. This equates to a zero deviation in pressure as displayed on board in the car.

I ran the car like this for a while (500 miles) but it felt too soft.

On the plaque on the driver door B Pillar it says the car should be on 37psi all round, which is what I’ve set the tyres to, so now the deviation measure on board the car says +4. Car feels better to me and efficiency seems to be better too.

Not sure why the car is setup with a baseline of 33psi and the plaque recommends 37psi?

What are you guys using?

btw I had the same discrepancy on my Taycan, and depending who you asked at Porsche I always got a different response

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[Frankie]

My car was delivered with 2.5 Bar (36,25 psi) on 21" and air suspension.

 

[GDang]

I got the 21” macan design wheels on Michelin PS4 all—season with air suspension and car came with 44psi all around. Door jam shows 45psi all around

 

[Wobbler]

My 4s with 20 inch wheels on MIchelins PS EV’s was delivered on 37psi (+4). Seems fine to me.

 

[SteveInKirkland]

My 22" wheels w/Continental all season tires were delivered at 44 (+1) PSI front and 46 PSI back (+4). I haven't touched it and it generally seems fine, the least of my worries.

 

[jcart5]

I’ve got the same 20” 4S wheels as you (and Bridgestone) and mine was delivered 3 weeks ago showing 41psi and +3 all round in the app. We were thinking of reducing them a little but haven’t got around to it yet and not done any significant journeys yet. Interesting to read what everyone else has.

 

[krissrock]

mine delivered with 37-36 psi on 20's

 

[BigApple]

my dealerhship put them on 46psi (winter here in NJ) i guess thats why. Seems high to me.
but maybe 22s need that

 

[Karl]

The plaque shows the pressure at full load.
The car comes with the tires inflated to the recommended pressure for partial load.

The manual provides the values for both.

Plaque shows full and partial load
Partial is 37psi and full is 40plus from memory

 

[wmras]

The plaque shows the pressure at full load.
The car comes with the tires inflated to the recommended pressure for partial load.

The manual provides the values for both.

Porsche also suggests (without specific settings) lower than normal tire pressures for track use.

 

[Doggo]

Why not use the PCM - it allows you to select your size/season, and based on current temps tells you what the target should be.

NJ right now - PCM tells me 36/39 for winter 21

 

[Ranj]

Here mine - was wondering should I reduce the air !

 

[krissrock]

doesn't that show that your pressure is actually low normally?

isn't the +3 the deviation from normal or when it was last set?

 

[wmras]

isn't the +3 the deviation from normal or when it was last set?

It means 3 psi higher than normal (or optimum).

Ours has displayed -1 for a month of cold weather but rises above normal fairly quickly during highway speeds. I leave it low in case of snow.

 

[daveo4EV]

Context : UK 4S, 20inch 4S wheels with Summer tyres (Bridgestone), air suspension

Just wondering what tyre pressures you guys are running with and why.

My car was delivered with 33psi all round at beginning of December. This equates to a zero deviation in pressure as displayed on board in the car.

I ran the car like this for a while (500 miles) but it felt too soft.

On the plaque on the driver door B Pillar it says the car should be on 37psi all round, which is what I’ve set the tyres to, so now the deviation measure on board the car says +4. Car feels better to me and efficiency seems to be better too.

Not sure why the car is setup with a baseline of 33psi and the plaque recommends 37psi?

What are you guys using?

btw I had the same discrepancy on my Taycan, and depending who you asked at Porsche I always got a different response

factory pressures - or PECATL PDI pressures - why because I'm too lazy to change them.

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