GS300 Sport Wheel tyre pressures

Does anyone know what the actual Toyota recommended tyre pressures for these wheels is? I've always wondered...

If it's a Mk.2, it's 33psi.

32 all round according to Lexus

32 eh? Oops, I've always used 35psi.

I'm talking about the 8.5" front, 10" rear 18's as seen here:

http://www.toplessdriver.com/gallery/albums/shinysam/SUC30205.sized.jpg

What does it matter what tyre pressure Lexus recommend for those wheels on a GS300? It's not going to be the same for those wheels on a Supra.

It'll be within a fag paper of being the same though surely? Seeing as the Supra is a GS300 in disguise.

I run mine with 34psi.

Supra - 1570 kilos

Aristo V300 - 1680 kilos.

So I would run 33psi.

On circuit, or harder cornering run up to 45psi.

Does not apply to slick tyres.

Does anyone know what the actual Toyota recommended tyre pressures for these wheels is? I've always wondered...

Mine are at 32psi all round

It'll be within a fag paper of being the same though surely? Seeing as the Supra is a GS300 in disguise.

What?????????????????

On circuit, or harder cornering run up to 45psi.

er... not a good idea. On a circuit once the tyres heat up, so does the air in your tyres, and hence they are then running at a higher pressure. If anything you want to lower your tyre pressure for track work.

Have to disagree. A cold 45psi is about right for circuit if you are driving on the limit. 40psi upwards is what most guys run...this reduces 'scrubbing' of the tyre shoulder/wall but reduces grip also as a downside. If your tyre pressure isn't high enough, the tyre is liable to come off the rim...I've seen this happen, it's not pretty.

In the wet, standard psi is fine.

For slicks, I run 29psi cold, but again these are different tyres completely with a re-inforced tyre wall.

Have to disagree. A cold 45psi is about right for circuit if you are driving on the limit. 40psi upwards is what most guys run...this reduces 'scrubbing' of the tyre shoulder/wall but reduces grip also as a downside.

Well you're entitled to your opinion, but it's been a while since I've read such gibberish on here (actually it's not that long). A cold 45psi would be much higher once tyres are heated up and would possibly be bordering on dangerous. I don't know who these "most guys" are, unless perhaps they're all drifters who don't really want much grip.

I used to run 33psi on circuit. My tyres got totally scrubbed. Once I was black flagged because my tyre looked like it was going to pop off the rim.

If you read track-day guides they recommend you over-inflate your tyres - road tyres are just not designed to take the stress on the tyre-wall. My mechanic runs a motorsport rally team and also advised me to do this.

40psi minimum would be a good starting point.

My slicks are rated at 22psi but because my car is heavier, I need to run 29psi....again over-inflation.

If you read track-day guides they recommend you over-inflate your tyres

Some do, but you should be looking at 5psi max, but you're not going to get your tyres to come off the rim unless they're seriously low.

Tyre scrubbing levels will determine where your PSI should sit.

For me it's 45psi on a road tyre. At 40psi I was still getting ridiculous scrubbing.