Out of interest I have been contemplating upping my standard tyre pressure to about 38-39f and 37-38r I have done this before on my old 106 and it made its handling a little more predictable but at the cost of a little more lift off oversteer and reduced grip in the wet.

 

For previous trackdays (in a different car) i have done this upping the pressure to nearly 40 to try and retain some roll stiffness. Tyre wear isn't much of an issue to me as i don't do many miles a year. Obviously i will never exceed what the tyre manufacturer states and will likely not exceed 40 psi when cold (i am aware pressure increases as the tyre warms up). Tyres acting as an undamped spring and all that it will have little to no effect on the weight transfer effect on the suspension but can i suppose make the suspension work marginally harder by transffering more bump force to the spring and damper?

 

what TP do people run?

34 all round. +2 on the Skoda recommended.

You haven't stated what car or tyre size you have.

39f & 36b is standard pressure on my Audi S4 (245x18x40). This goes up to 41f & 41b when performance or a full car is required.

I know if my tyres drop any more than 2psi I get quite bad tramlining and vague steering, so keep them checked regulary

I wouldn't go much higher than 2psi over the higher values stated in your manual though

You haven't stated what car or tyre size you have.

39f & 36b is standard pressure on my Audi S4 (245x18x40). This goes up to 41f & 41b when performance or a full car is required.

I know if my tyres drop any more than 2psi I get quite bad tramlining and vague steering, so keep them checked regulary

Apologies that would help standard 17" spider alloys with 205/50/17 tyres cant remember the load but think theyre XL ones

Tyre make makes a difference too. I kow several people have noted that Toyo T1-Rs need +2psi to avoid excess edge wear, but they're unusual IME (over Barum, Dunlop, Michelin and Toyo (D&M on car when I bought it; B were a distress purchase)).

 

So I'd suggest going up a few PSI at a time, and keeping notes of pressures run, and subjective effects.

Odd thread to start, and not actually know exactly what your tyre size, speed/load rating is, or if they are XL's, (Post #4)

Have you now checked?

Do you not notice what the writting says on the side wall while inflating and deflating your tyres?

 

Maybe worth getting 4 wheel Alignment check and adjustment on the vehicle.

Start off with suspension and steering being correct,

then correct and safer tyre pressures. To suit the vehicle and use.  As most do.

 

(if talking Track Use, then you do the adjustment when not on track, but actually using with pressures

to suit a Passenger car being used on UK roads. But then you know all that.)

 

Then run the car and adjust the tyre pressures, to suit the driving being done, the load being carried, the weather conditions and temperatures,

& to the Recommended Tyre Pressure range of the tyres.

Not any one pressure can be doing all jobs all year.

 

http://www.michelin.co.uk/tyres/learn-share/care-guide/cold-weather-tips

Im running 35 front and 38 rear on a set of runflats (bmw) no issues so far

The reason i've done this as runflats wear the shoulders out first as there is no give in the sidewalls

Odd thread to start, and not actually know exactly what your tyre size, speed/load rating is, or if they are XL's, (Post #4)

Have you now checked?

Do you not notice what the writting says on the side wall while inflating and deflating your tyres?

 

Maybe worth getting 4 wheel Alignment check and adjustment on the vehicle.

Start off with suspension and steering being correct,

then correct and safer tyre pressures. To suit the vehicle and use.  As most do.

 

(if talking Track Use, then you do the adjustment when not on track, but actually using with pressures

to suit a Passenger car being used on UK roads. But then you know all that.)

 

Then run the car and adjust the tyre pressures, to suit the driving being done, the load being carried, the weather conditions and temperatures,

& to the Recommended Tyre Pressure range of the tyres.

Not any one pressure can be doing all jobs all year.

 

http://www.michelin.co.uk/tyres/learn-share/care-guide/cold-weather-tips

 

I know the tyres are 205/50/17 for sure and i also know that the load rating is XL i checked when i ordered tyres recently, i also had the tracking done at the same time. 

 

I don't have the car with me today so couldn't say exactly what is under the petrol cap in regards to tyre pressure but i know its usually in the range of 35f 33r for me. The car is typically unladen and seldom has more than 2/3-3/4 of a tank of fuel in it. When the weather dries out a bit i will be upping the pressure as reducing contact patch and sidewall compliancy in the wet at this time of year isn't usually a wise idea. Also i find it depends on the make of tyre too of course the Kumhos on the front require a bit more pressure than the Maxxis on the rear. Does anyone else run slightly higher pressures?

 

  

I don't have the car with me today so couldn't say exactly what is under the petrol cap in regards to tyre pressure but i know its usually in the range of 35f 33r for me. The car is typically unladen and seldom has more than 2/3-3/4 of a tank of fuel in it. When the weather dries out a bit i will be upping the pressure as reducing contact patch and sidewall compliancy in the wet at this time of year isn't usually a wise idea. Also i find it depends on the make of tyre too of course the Kumhos on the front require a bit more pressure than the Maxxis on the rear. Does anyone else run slightly higher pressures?

Already answered; see #5 above.