Tire Pressure

[cm07yaris]

Are you supposed to fill your tires to the max. pressure stated on the sidewall? If not, how much should you?

[cm07yaris]

anyone?

[OldSuperSport]

Usually you would keep the pressure at the sidewall PSI. I think its more important these days with the super low profile tires. In the old days you could overpressure a tire and get better mileage (a little more) at the expense of faster center tread wear.

[cm07yaris]

so go with the sidewall max pressure? thanks

[cm07yaris]

tires came mounted and balanced at 35psi, sidewall max is 50

[churp]

Toyota manual says 32 psi, their recommendation for handling and comfort.....pressure listed on the tire sidewall is a maximum according to the tire manufacturer, at this psi mpg will be better, but traction while cornering may suffer, ride will be harsh, and some say tires will wear in the center of the tread quicker.

Personally I use the max sidewall pressure for mileage.

[Indianspringsaz]

Max-44psig. Thats where I run them

[mr_squiggle]

Mine are kept at 40psi
Seems to do the trick nicely.

[cm07yaris]

thanks for the input, i'm also not running the stock tires. i'm running 205/50-16, i'll just have to experiment a little, i'm guessing 45+ should be fine for my needs. thanks again

[Black Yaris]

Oh God.... not this debate again...... 32-35psi is the pressure recommended for this car depending on the tire sizing you upgraded to.... som of ya'll are running much too high of pressure for daily driving, you are going to wear tires out way too fast....

[Motorhead6T5]

Oh God.... not this debate again...... 32-35psi is the pressure recommended for this car depending on the tire sizing you upgraded to.... som of ya'll are running much too high of pressure for daily driving, you are going to wear tires out way too fast....+1 Ride must be harsh too. I run mine at 32.

[grampi]

If the recommended pressure is 32, then 37 psi is probably about the optimum pressure.

[Black Yaris]

I run my 17's with 205/40's at 35 psi for the best ride, handling, and tirewear...

[voodoo22]

I keep mine at 40 psi.

A little harsher ride, but I like the way the car handles with less sidewall flex.

I don't know how much better FE I get with 40 psi, but it can't hurt.

[Thotprawsis]

I'm running the stock tires. I've had them @ 32psi when on long trips for comfort. 40psi seems to improve the preformance, but very harsh ride. 35psi is where I'm at now and seems to be a good compromise for every day use.

[ricky2k1]

the sticker on your door has the optimum tire pressure for your car.
anything else could cause uneven tire wear.

[churp]

the sticker on your door has the optimum tire pressure for your car.
anything else could cause uneven tire wear.

This only pertains to the stock tires w/stock rims. Changing rim width, tire size or aspect ratio, spring rates, how you load your vehicle, etc. makes the manufacturers recomendations meaningless.

[grampi]

the sticker on your door has the optimum tire pressure for your car.
anything else could cause uneven tire wear.

Not true. I can tell you from personal experience the pressure listed on the driver's door IS NOT the optimum pressure. I have found that running your tires at about 5 psi over the recommended pressure increases tread life, improves handling (stiffer sidewalls), reduces tire noise, and improves fuel economy. The only thing that's better at the recommended pressure is the ride, and even then, only somewhat better. Some people run their tires at the max pressure listed on the tire's sidewall, however I've found door pressure +5 is usually the best compromise between getting all the other bennies and a smooth ride.

[eTiMaGo]

before this escalates into another full blown flame-fest, here is my definitive two cents:

As with most aspects of tweaking a car, it's a compromise. there'll always be a trade-off to higher or lower tire pressure. Increase pressure, and you will improve handling and economy, at the expense of comfort, and if you push it too far, tire longevity. The trick is to find the right balance which suits your preferences and driving style.
That's all there is to it, really!

[Black Yaris]

Not true. I can tell you from personal experience the pressure listed on the driver's door IS NOT the optimum pressure. I have found that running your tires at about 5 psi over the recommended pressure increases tread life, improves handling (stiffer sidewalls), reduces tire noise, and improves fuel economy. The only thing that's better at the recommended pressure is the ride, and even then, only somewhat better. Some people run their tires at the max pressure listed on the tire's sidewall, however I've found door pressure +5 is usually the best compromise between getting all the other bennies and a smooth ride.
well your statement as also not true, 5 psi over the recommend may cause roll over hazzards in some vehicles, the tires being too stiff will cause them to fail government safty rollover test, this was the case back with the whole Explorer/Firestone recall. no matter what tires on those mid to late 90's explorers they can not pass the rollover test with any more than 26psi in the tires. But if you know anything about tire load index's you know that 26 psi in a tire can not hold the weight of a small SUV... there inlied the problem... regaurdless, you have some holes in your theories

[grampi]

well your statement as also not true, 5 psi over the recommend may cause roll over hazzards in some vehicles, the tires being too stiff will cause them to fail government safty rollover test, this was the case back with the whole Explorer/Firestone recall. no matter what tires on those mid to late 90's explorers they can not pass the rollover test with any more than 26psi in the tires. But if you know anything about tire load index's you know that 26 psi in a tire can not hold the weight of a small SUV... there inlied the problem... regaurdless, you have some holes in your theories

However, the rollovers being experienced by Explorer owners weren't due to overinflated tires. They were being caused by blowouts due to underinflated tires. Tire manufacturers would not list a max pressure on their tire's sidewall that's so much higher than the auto manfacturer's recommended pressure (this pressure is usually 44 PSI) if that pressure could cause safety issues. This would open them up to law suits. If there's a problem with any vehicle's handling with any tire pressure between the auto maufacturer's recommended pressure and the max pressure listed on the tire's sidwall, then there's a problem with that vehicle and it should not be allowed on the road. That problem wouldn't be due to tire pressure.

[Black Yaris]

However, the rollovers being experienced by Explorer owners weren't due to overinflated tires. They were being caused by blowouts due to underinflated tires. Tire manufacturers would not list a max pressure on their tire's sidewall that's so much higher than the auto manfacturer's recommended pressure (this pressure is usually 44 PSI) if that pressure could cause safety issues. This would open them up to law suits. If there's a problem with any vehicle's handling with any tire pressure between the auto maufacturer's recommended pressure and the max pressure listed on the tire's sidwall, then there's a problem with that vehicle and it should not be allowed on the road. That problem wouldn't be due to tire pressure.

I will give you that

[grampi]

before this escalates into another full blown flame-fest, here is my definitive two cents:

As with most aspects of tweaking a car, it's a compromise. there'll always be a trade-off to higher or lower tire pressure. Increase pressure, and you will improve handling and economy, at the expense of comfort, and if you push it too far, tire longevity. The trick is to find the right balance which suits your preferences and driving style.
That's all there is to it, really!

As long as you don't increase the pressure so as to exceed the max pressure listed on the sidewall you aren't going to experience any abnormal or higher than ordinary wear. It's when this pressure is exceeded, or you drive on underinflated tires that you'l experience premature wear.