[mickyboy]

Hey,
Just wondering what is the best tyre pressure to run for everyday driving?

I know the sticker inside the cubby box says 35psi but I am used to running higher pressure in my previous cars.

I am currently running 37 psi FRONT and 38 psi BACK.
I am tempted to go a little higher maybe 38 & 39?

Little worried in regards to the stiffer sidewall of the shittenzzas though and with that elusive feathering issue as well.
Will running higher pressures actually lessen tyre life (ie) feathering or should I be running lower than 35 psi pressure?

What do you guys run/think is the best????

 

[harryw]

I have mine at 38 front and back.

From memory this is what is recommended by Nisshit.

The car would handle like a piece of **** with 35 in them, unless of course you are at the track or plan on doing a lot of fast driving on the road.

As always

H

 

[mickyboy]

Well I just went and checked my tyre pressure at the local BP. It said I had 33 psi in all four tyres. The thing is, I checked the pressures two days ago and put in 37 front & 38 back. This was at a Shell servo.
Both times I used one of those electronic set & forget units.

It is obvious that those things suck!!!!
There is no way I lost that much pressure in two days.

Will have to invest in my own pressure guage to get accurate readings!

 

[harryw]

Micky, after riding motorcycles for many years I can vouch for the inaccuracy of those things at servos.

As I'm sure you can imagine, tyre pressures are even more important on a bike than a car and even more so when you go to the track.

Every bike rider "worth his salt" carries his own pressure monitor for this very reason.

Don't ever rely on them to completely accurate ay any time, and I'm sure you know this, but you should always check your pressures when the tyres are cold.

As always

H

 

[davidm]

I am currently running 37 psi FRONT and 38 psi BACK. I am tempted to go a little higher maybe 38 & 39?

When I had the OME springs I settled on 40psi in the front and 36psi at the back ... that is cold. I tried running softer pressures at the front than back (ie. 36/39psi front/back), but did not like it at all ... car wanted to undertseer a lot with the soft pressures at the front.

Now with the whiteline springs I run 35psi at the front and 32psi at the back.

 

[ky350]

Currently running 36 all around.
I too have noticed that the pressure difference between servos is significant, so I usually check them at the same servo. I find that the Shell servo I use tends to have readings matching the readings I get from my own tyre pressure guage.
Please not that I select my daily driving pressures to try to ensure a good contact patch so the tyres will wear evenly accross the tread. I do not set the pressures to achieve max steering response or try to dial out under / oversteer as these conditions are not often achieved during daily driving.

 

[scathing]

I tend to run 40psi all round.

Given how stiff my sidewalls are anyway, I don't lose out that much in ride comfort.

 

[mickyboy]

hey scathing, any unusual probs with ur tyres wearing running at 40psi?

 

[scathing]

Considering the fact that no-one uses my current tyres for street use, its really hard to say.

They're wearing faster on one side (on the outsides for the front tyres, and the inside for the rears) but that's to be expected. That they're also wearing very quickly is also standard.

Having a chat with guys who race, and tyre guys, they'd recommend running higher pressures for handling purposes anyway so I don't have an issue with it. The car's rarely ever commuted these days so I want the handling over anything else.

I forgot to check the tyres when I was running the RE040s so I don't know what my car's like.

 

[mickyboy]

Thanks, but cause they are tracked ur right, can't really compare to normal everyday road use.

 

[mickyboy]

So I bought a little digital hand held pressure thingo. This is more accurate, says I have 37.5psi instaed of the 33 psi that was showing at BP!!!

Now I am perplexed. With the new sways grip is of the utmost importance, so what pressure too run? higher or lower than oem specs for the Shittenzas?

 

[davidm]

Now I am perplexed. With the new sways grip is of the utmost importance, so what pressure too run? higher or lower than oem specs for the Shittenzas?

If you're planning on driving agresively then always go higher. Still, tyre pressures are a very personal thing so just experiment a little and settle on what feels good for you.

 

[jinxxycat]

Also the change in pressure could come about if there is a change in temperatures. A drop in temp will make the air in the tires shrink and make the pressure less. Just a thought