Fastfrog

Got advice from a friend who also owns a 2006 Carrera S (his a 4S) that lowering the recommended tire pressure by 10 psi makes the ride much more comfortable. Porsche apparently recommends tire pressure for hard driving, which makes the car quite rattling on New York and New Jersey highways and potholed roads.
Anyone with a recommendation for leisurely enthusiastic driving, but not track bound?

golftime

I think you will find there are some slightly different opinions on the optimal tire pressure but running 10 lbs. low is asking for trouble in my book. It will certainly soften your ride but you will experience poor handling, irregular/uneven tire wear, and build up dangerous heat at highway speeds.

Goose 993

33f 37r on my 19 s wheels

mike cap

34 psi front and 38 psi rear at 65 F ambient is perfect for my 2011 C4S with Michelin PS4 tires 19” rims. Good smooth ride and handles superb

Butzi 997

I don't know if everyone realizes Porsche lists different loads and tire pressures for different versions of 997s, I didn't at first.

You may be able to drop a couple more pounds from recommended without getting a TPMS warning, but dropping 10 psi all around isn't good for the tires or the driving dynamics of the car, IMO.

From the Book-

Petza914

I run 32 F & 37 R in my wife's and 35 F & 40 R in mine. Hers is a bit softer for more comfort and less aggressive driving and mine is higher for higher speed and more aggressive driving.

Fastfrog

Much appreciate everyone's feedback. Very clear!

Hella-Buggin'

Porsche's recommended tire pressures are for fuel efficiency.
10lbs seems a tad low. I run 32F/36R cold pressures. This helps absorb the bumps and adds some grip when pushed hard.
As far as taming the harsh NYC streets, tire choice matters. Choosing a tire with softer sidewalls is key. But the trade off is
they will not provide that sharp cornering feel when having fun. And for me that's more important.


-Mark

arob

I run 36F / 39R for street driving. I think I got those numbers off the door jamb?

ATX_Native

If you want a better ride, get 18’s.

Made a HUGE difference when I switched.

Targa32

Look in the back of your manual- there is a chart that shows tire pressure for performance and also a comfort tire pressure. In the settings you can designate which tire pressure you wish to use and the this adjusts the plus and minus calculation for your selection.

Setting tire pressure to the comfort psi makes a huge difference in regards to the ride on the road.

Setting the comfort setting psi on my 23’ Panamera Executive made a huge difference in the ride quality — the door PSI will make the ride very stiff and a lot more uncomfortable.

the Door frame psi numbers are for maximum weight carrying.

what is really annoying is when I take my cars to the dealers - the mechanics always set the pressures at least to the door numbers but often even higher.

I opted for a 2021 Targa 4 specifically as the standard wheels are 19”/20” rather than 20”/22”- the outer dimensions are nearly identical but more rubber and less steel. In a Targa which is a go to lunch wagon or for weekend tours with the wife - the smaller wheel set along with setting the comfort psi levels allows me to drive my Targa for 600-800 miles in a day without any fatigue. Also makes my wife very happy.

atihun

What about handling? Did you see any negatives with taller sidewalls?

ATX_Native

Nope.

The only huge difference was moving from 305 to 285, but honestly once you get used to it the car feels fast and just a bit more playful.

Here is some reading + a video.

https://www.tyrereviews.com/Article/...inch-tyres.htm

Frank 993 C4S

997 Race Cars usually run 18" tires.

jamesinger

I always comment that on the GT3s, the door card sticker pressures are 29f/33r


I always run Gt3 size tires, even on my Lobster Forks but with the GT3 wheels and stock GT3 size tires, I will run 29/33 with no issues. Running 40psi seems high when the max is 50 if you are measuring from cold.