Celica Forums General Discussion Exterior tire pressure?

Does anyone know how much pressure I need to put in a tire that's 225/40ZR18?

doesnt it say inflate to ______ on the sidewall somewhere??

try to check on your tires it suppose to say it over there...

I've got the same tiresize. I was told 2.5

"MAX PSI: ##" is usually written on the side of your tire - where, "##" is the Pounds per Square Inch (PSI) that the manufacture recommends you put into your tires.

The correct way to fill your tires is to use an air compressor (at your gas station for example) and fill to a few pounds just about MAX PSI, then check the pressure and release some of the air until it is exactly at "MAX PSI".

By having your tires under inflated, you may be loosing on gas mileage, causing more pollution and wearing your tires out faster and passably un evenly...

By having your tires over inflated, you may be wearing them out more quickly and you may be more at risk of traffic accident because your stopping distance will be reduced because the tires might not be able to grasp the road as well.

The average tire pressure that is printed on the wall of your tire for a standard automobile is between 25PSI and 45PSI ... ALWAYS CHECK WHAT YOUR TIRE'S RECOMMENDED PSI SHOULD BE SET TO... if you cannot read what is written on one tire, check another that is on your car - 99.9% chance that all the tires on your car are the same (as they should be)

...

NOTES:
Some racers like to relieve 5 to 8 lbs of PSI from the tires where the engine gives most torque (FWD or RWD), to make them more "STICKY" - However, this works just fine for the track, but for daily driving, you should always inflate to manufacture's recommended PSI

ANd you might also want to check out this artcle on Tire Rotation...
https://celicahobby.com/ubbthreads/thread.f_76700_0_collapsed_5__1.html

When filling your tires with an air compressor such as the ones found at gas stations - its ALWAYS good practice to shoot the first bits of air out (away from yourself).

This will release any water that may have formed in the air compressor while it was waiting for use.

if you get enough water into your tires, they may become uneven because that water will make them unbalanced.

Also, if you live in a place that gets snow/ice, that water will form into ice inside your tires and when you drive, it will make knocking noises un till its all melted - and then will make sloshing noises after that (your local wheel shop can remove the water from your tires for a small fee)

"Some people aren't sure where to set their tire pressures. The one thing that is certain is that the maximum inflation pressure on the sidewall is not the right one to use."

from http://www.sportcompactcarweb.com/tech/0208scc_tires/

i thought you look on the driver side door gap for that sticker that tells you how much pressure to put in..??

the numbber on the tire is just the max amount of psi the tire can handle?????????

So I contacted Toyo, and they said,
So, at least for Toyo Proxes FZ4 215/45/17's on a 2000 Celica GT, 32 psi is the recommended setting.

typically 30psi is good enough...