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does it vary by brand or is it a universal standard???

im running my toyos at 30 psi... but when i corner it feels weird.... like its losing grip... mind u they r new tires... on the website it says the max psi is 44.... but what do u think is it good to run at max psi?

 
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No, its not good to run @ full inflation since your tires will wear out faster due to overinflation...yeah, it may feel like a tighter ride with more air in, but you are slowly but surely damaging your tires...I am pretty sure the recommended tire pressure in on the placard posted inside the door jamb on the drivers side...remember, you have to check the pressures when the tire is cold i.e., check in morning after sitting all nite...


2Hottie

 
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30psi front/29psi rear

The manufacturer's specs most always go for any brand or type of tire you put on the car.

The general consensus concerning the best tire pressure for all around performance on the street is 32psi.

Max psi is exactly that, the MAX. You never want to be even close to the max. Also, remember that psi increases with heat. So, if you have a max rating of 45psi and inflate your tires to 41psi (cold pressure), you will probably end of exceeding the max psi once the tires heat up. This is definately asking for problems.

 
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If you do some weight calculations you will come to find that manufacturers spec of 32 all around makes very little sense unless you carry a few hundred pounds in the trunk all the time. With normal use - yourself and a passenger in the car - about 60% of the cars weight is in the front - if you set up the front at 32 and use a 60/40 weight distrib your rears would run at about 26 or 27 lbs. After playing a bunch with my tires (not stock but close on my daily driver) I have some to like 31 front and 27 rear. I is still firm and shows no real sidewall outage but has some suppleness - at leat for a civic.

JASON

 
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max pressure is the max for normal wear, the tires from the factory are at the max for them, all it means is, if you inflate them past that point, then youll get abnormal wear. as for heating up, yeah, but its only 1psi for every 10 degrees different from cold pressure, so if theyre at 35psi on a 75 degree day, and you go out driving for an hour or so, you might hit37 or 38 psi, but, it depends on the conditions, if youre doin 90 on the interstate, yeah, youl gain 20 or so degrees in your tires, but for an average speed of say 60 or less, you dont really have to worry about that. if you live in a climate that sees the seasons temperature change(i.e., north of south carolina, oklahoma, etc.) then youll want to check the pressure when its been sitting outside for a while when the temp outside starts to change, theyll loose a few psi in the winter, and youll have to lower the pressure in the spring again.