Engine tire pressure

tire pressure

what's your tires pressure during winter and summer?

depends man...are you talking about the stock tires? or are you on aftermarket wheels and tires???

i am talking about stock tires,
now i'm curious, do you need to set the pressure differently between stock and performance tires?
please advice :?:

Your cold tire pressure really ought to be the same in both winter and summer. IMHO the best time to check the tire pressure is when the car hasn't been driven yet that day. It seems to me that Toyota recamends a CTP of 30 PSI (thats whats on the label in my glovebox in my CE, dunno about S/LE with 195's)
Now, when I run with 185's (stock tire sixe) @30psi I've noticed that the outside edges of the tires wear more quickly compared to the center of the tread. This pattern of wear is consistant with underinflation. I suspect Toyota chose this rating to inprove the ride quality- squishier tire= smoother ride.
I run my tires at 34-35 psi CTP winter and summer (all at the same, not one or two at 34 and the rest at 35. having tires with different pressures can cause the car to pull one way or the other.) I haven't noticed an increase in the wearing of the center tread (a sign of over inflation) and this pressure gives an increase in stearing response and breaking. It also helps the car coast better. This pressure also seems to decrease some of the understeer present @30psi.
For what its worth, I'm running BF Goodrich Traction T/A's in 185 65 r15. I wouldn't runn anything lower than 30psi, with one exception, as running underinflated causes more friction, which means more heat, which can ultimately lead to a blowout. The exception to the underinflation rule is if you are having to drive in snow. If you find yourself stuck, letting out a bit of air can helo you gain traction (increases the contact patch but this is not for everyday driving, just emergencies. Each brand and model of tires will have its own cold tire max pressure. These are often much higher than the 30psi puth forth by Toyota. So long as you stay well below the tire's max, you ought to be fine, so long as you turn your wheel ought every so often and check to make sure the wear is even.

I agree with PanChiFan, he hit all the nails on their heads, a little extra air isn't going to hurt anything, besides possibly a slight reduction in traction. And, underinflation is much more dangerous than overinflation!

I am running mine at 38 all around for the same reasons.


G

thanks guyz, i always set all tires around 30 to 32,
but some people said that they set up front tires lower than rear tires, eg:
front 30psi , rear 32psi, i don't know what the purpose is.
by the way Garrett, don't you thing your tire pressure too hi?

when I had stock tires on the car, I ran 36-38psi front and 30psi rear. In cold weather (possibility of 40ºF or below), I ran the same pressure, but had to put some air into the tires to bring it up to that pressure as colder weather causes the pressure to fall due to a decreased volume (temp and volume are proportional to each other).

Trav