racer

I was just playing with tire pressures and noticed that my Nitto 555extreme allows max pressure of 50psi (225/40/18). I've checked the archive and people say they only use like 38-40 psi on their 225/40/18 tires, but wouldn't that be a bit low? I always thought running 3-4 psi less than their max would be the best ideal pressure to run for performance and comfort.

RobC

I've been running 42 psi in the front and 38 in the rear. I was getting a little bit of tire roll in hard cornering. The recommended pressures seemed way too low for aggressive driving.

racer

why r u only running 42F and 38R when MAX is 51 psi?

Andy Hedin

That's the maximum recommended pressure for that particular tire according to the tire manufacturer. Keep in mind that that same exact tire (size and all) could be spec'd on a lighter car and/or a heavier car than the A4. So always inflate your tires based on what the car manufacturer recommends and of course, never exceed the max PSI listed on the sidewall.

Andy Hedin
'97 A4 1.8Tqms, Garrett, Abt, Borla, E-Codes...

racer

I have 44psi all around...is that safe? (max 50psi)

Andy Hedin

Play around with the pressure some...feel free to experiment, the air is free :-)

WarrenY

I don't know who, but someone posted recently that they bent a rim because they ran their tires around 40psi. IIRC, it was an A4...I don't remember if they were running stock rims or aftermarkets.

Warren

racer

rims bent probably because not enough air pressure.

WarrenY

Actually, the original poster of that said his were inflated to around 40psi, well above what Audi recommends. He was told that overinflating the tire doesn't allow the tire bend with a bump, so all the energy of the impact is delivered to the rim. If I remember right .

W