New tires please help with correct PSI.

[2009Camrysewhite]

I have a 2009 camry se 4cyl. I just upgraded my tires to
FALKEN ZE-912 235/50/R17 on stock rims. I live in Miami florida which gets very hot in the summer.
What is the correct PSI that I should inflate my tires to.

thank you.

[BlackCam09]

should say it on your driver side door jamb area on the sticker.

[2009Camrysewhite]

Those numbers are for the stock tires, which are 215/55/17. My new tires are 235/50/17

[Donald E. George]

I think you would still inflate your tires to what Toyota placed on the placard. Rkegards

[MJZ]

It doesn't really matter. 32PSI minimum, 35 or 36 PSI if you want better fuel economy and worse handling.

[Twiztedxtasy]

What MJZ said.

~35 psi for DD driving
~30 if you like spirited driving

[DOHCammer]

Originally Posted by Twiztedxtasy

What MJZ said.

~35 psi for DD driving
~30 if you like spirited driving

Just the opposite. Higher pressures are better for spirited driving. I run 40-42 lbs in my Contis and they respond very well. High performance tires can run higher pressures without the tire wear problems that normal tires will exhibit. Another added benefit is better gas mileage. Of course you will have to put up with a rougher ride, thats a given.

[ArmY1]

Originally Posted by Twiztedxtasy

What MJZ said.

~35 psi for DD driving
~30 if you like spirited driving

how much for 225/40/19?s i have 37 is it too low?

[Kycamrymaker]

Originally Posted by 2009Camrysewhite

I have a 2009 camry se 4cyl. I just upgraded my tires to
FALKEN ZE-912 235/50/R17 on stock rims. I live in Miami florida which gets very hot in the summer.
What is the correct PSI that I should inflate my tires to.

thank you.

What do those tires look like on those wheels? Do you have any pics, I'm curious to know how that looks. Thanks.

[jsie]

Download "Load & Inflation Table Application Guide" from this link:
http://toyotires.com/tire-care-safet...flation-tables

To find the pressure equivalent to OE tire:
1) Figure out if your new tires are P-metric or ISO metric (page 86).
2) If they are P-metric: ~29 psi (per table in page A6).
3) If ISO metric, tire size is useless for finding pressure. You need to know the load index; then find the pressure from the table on page A12.

[MJZ]

Originally Posted by DOHCammer

Just the opposite. Higher pressures are better for spirited driving. I run 40-42 lbs in my Contis and they respond very well. High performance tires can run higher pressures without the tire wear problems that normal tires will exhibit. Another added benefit is better gas mileage. Of course you will have to put up with a rougher ride, thats a given.

Just wrong.

[bdy0003]

Higher pressure for less resistance - your engine has to work less thus getting a better fuel economy. However, less rubber meets the road-worse handling. Try cornering really fast on ice skates and you'll know. Compare that with cornering on roller blades.

Lower pressure- more resistance-engine works harder to go the same distance-more rubber meeting the road-better handling.

Originally Posted by DOHCammer

Just the opposite. Higher pressures are better for spirited driving. I run 40-42 lbs in my Contis and they respond very well. High performance tires can run higher pressures without the tire wear problems that normal tires will exhibit. Another added benefit is better gas mileage. Of course you will have to put up with a rougher ride, thats a given.

[DOHCammer]

Originally Posted by bdy0003

Higher pressure for less resistance - your engine has to work less thus getting a better fuel economy. However, less rubber meets the road-worse handling. Try cornering really fast on ice skates and you'll know. Compare that with cornering on roller blades.

Lower pressure- more resistance-engine works harder to go the same distance-more rubber meeting the road-better handling.

I was always taught to increase pressure for better high speed handling and steering response. Here's what Tire Rack says about underinflation versus overinflation. Nowhere does it say that an underinflated tire is better for handling:

Disadvantages of Underinflation
An underinflated tire can't maintain its shape and becomes flatter than intended while in contact with the road. If a vehicle’s tires are underinflated by only 6 psi it could lead to tire failure. Additionally, the tire’s tread life could be reduced by as much as 25%. Lower inflation pressure will allow the tire to deflect (bend) more as it rolls. This will build up internal heat, increase rolling resistance and cause a reduction in fuel economy of up to 5%. You would experience a significant loss of steering precision and cornering stability. While 6 psi doesn’t seem excessively low, remember, it usually represents about 20% of the tire’s recommended pressure.
Disadvantages of Overinflation
An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more easily when running over potholes or debris in the road. Higher inflated tires cannot isolate road irregularities well, causing them to ride harsher. However, higher inflation pressures usually provide an improvement in steering response and cornering stability up to a point. This is why participants who use street tires in autocrosses, track events and road races run higher than normal inflation pressures. The pressure must be checked with a quality air gauge as the inflation pressure cannot be accurately estimated through visual inspection.

After reading this I knocked my tire pressure down to a more reasonable 36 psi. I did notice a reduction in steering response but it rides a lot smoother.

[bdy0003]

Ahh...I never said under-inflated tires. Thanks for clarifying that. The only condition in which you would go on underinflated tires (to my knowledge) if you were going off-roading. I assumed people wouldn't be that naive and under inflate their tires.

As for the handling and steering, I still think at the proper pressure is best. Think of the extreme case of riding on a road bike tire. Leaning is so much easier if its at the recommended pressure and not over inflated.

[AML]

Set all tires to factory pressures now. Note the effects it has on consumption and handling. Make adjustments if necessary based on what you prefer.

Different scenarios will require different adjustments. High speed handling requires higher pressures for higher stability. For handling on a road course type setting you more of a contact patch. So you don't want to over inflate because you'll only get the center of the tires making contact. You don't want to underinflate because you'll get the opposite and have too little contact in the middle, and you also get too much sidewall flex due to less pressure. For drag racing you want to drop the pressures on the drive wheels slightly, and overinflate the non-drive wheels.