GRIFF007

standard STi - what tyre pressures for normal road use?

Couldnt understand a word on the doorshut!

RRH

I'm using 33/30 at the moment, front to rear. Typically keep the rears 3psi softer than the front.

I run slightly higher pressures during the 'dry' months (whatever they may be), but I'd start off at 31f28r and increase incrementally until you're happy.

Hope this helps,
Simon.

BradN

I used 33 front 30 rear when I had the Bridgestones but found on Goodyear Eagle F1s these pressures were not enough. Now have 33 rear and 36 front. Much better.

GRIFF007

cheers chaps _ I.M. (sounds a bit like Thunderbirds?!) just quoted
f 32
r 26

your variance improves things how? - Its slippery out there, bit wary of too high a pressure - does comfort, noise take a big knock?

RRH

personally I wouldn't run the rears that low matey, but that's maybe just me

GRIFF007

why?

Jerry B

The F1s seem to have a softer sidewall and at standard pressures can feel a little vague in a straight line.
I run 34.5/32.5 when cold and find that this sharpens up the handling and feedback quite a bit without any noticeable effect on grip. I usually have some stuff in the boot myself, so go 1 psi or so closer to the front. It doesn't feel balanced with the back more than 3psi lower than the front to me, loaded or not.
The Bridgestones that I've used (RE011, S02) did not warrant higher pressures to my mind. And on classics the ride was firm enough that the softer F1 wasn't quite so noticeable, but with the softer ride of later models it all gets a bit flouncy.
All IMHO of course, and not on an Sti.

TonyBurns

iTrader: (3)

There should be a sticker on one of the door frames/doors that tell you what the correct pressures are.

Tony

GRIFF007

unfortunately it is ludicrously confusing - pick a pressure!

RRH

it can make the **** end feel a bit wallowy- try it and you'll see what I mean- I'm not feeling very articulate tonight

JWB

I have MY04 STI Type UK. Just purchased a set of Goodyear Eagle F1 GSD3's (225/45/17 Yrated) (£460 including fitting BTW) - can anyone elaborate on correct pressures. I am 34 in the front and 32 at the rear - does this sound OK?

Jason Knowles

Im running 32 front 28 rear on 04sti and this seems to be the best presure that ive come up with after experimenting with various presures.Im normally in the car on my own,so i suppose if you carry passengers alot you might want to raise this a little?

SL_WRX

If you convert the bar reading shown on the door (03/04STI), it converts to 33 PSI front and 28 Rear, so these are the recommended Subaru pressures.

russell hayward

Im sure Prodrive recommend 33/32 give or take one. Distinctly remember being told by them that 28 was too low for the rear.

Always ran mine 33/32 or 34/33, and never had a problem

D1CCY

TSL recommended me to use 33F/30R on my 17s (RE040) and to up it to 34F/31R when I changed to 18s (F1). This is what I use and it seems fine. Worth getting a really good gauge to make sure pressures are bang on.

Recommended pressures are at 20 degC ambient and 4 degC makes a difference of 1 psi so if the ambient is 24 then pressures should be raised by 1 psi to put the same amount of air molecules in the tyre, and conversly reduced when set in colder conditions. I have never dabbled with this concept, and I'd be nervous about reducing pressures in the winter. Arguably the tyres will run colder in the winter so the normal cold set pressure should work OK.