tfz_hebe89

iTrader: (1)

The tire pressure recommendation for OEM 18" is 35F and 37R. that's what it says too on the door panel.

Now that I switched to 225/35/19 and 275/30/19, should I still follow the tire pressure written on the door panel? The shop pulled the data of the tire and it says 31 F and 41 R for the tire pressures. they said those are the pressure recommended by the tire manufacturer according to the size. and so they put those pressures instead of what is written on the door panel.

I just want to make sure which one is the right one to follow.. tire experts pls help

thanks in advance

slee18

iTrader: (1)

what is the max psi on the tires?

pisaykotik

I maintain at least 38psi on my tires that are similar to yours.

tfz_hebe89

iTrader: (1)

50 psi..according to tire rack..

I wanted to put 38 too..but the shop kept saying I have to go with the recommendation by the manufacturer.

what about the front tires? You have 225/35/19 too, don't you?

pisaykotik

Front is 225/35 and rear is 255/35.

josephdoc

For any aftermarket setup, I recommend to follow "just about" dealer spec. Feel the ride and tweek the pressure with +/- 3 psi from this spec.

ATM the tpms modules in Toy/Lex systme mostly are the "learning system models" so it will pickup the new values when pressed the reset button after adjustment.

Never load air at max valve on the tire unless you know what you are doing. It is there only for safty issues.

Big Willy

The Dealer recomended PSI is not going to be the same. That is based on an entirly different tire size. You do not want to run the max psi on the tire side wall either. This is the Max Pressure...I would suggest running a bit more then the 31lbs in the front, but the shop is on the right track...The tire manufacture is who you should call yourself for the most direct answer.
You should be able to find a tech line number somewhere.
GL

t.is350.h

iTrader: (3)

If you keep 31 in the front you'll get a warning light...I have 235-30-20 in the front and I keep it at about 38-40 also. I think as long as you're not exceed the manufacture recommendation, you'll be fine.

inLine4

40 all around for me.

andyboy

iTrader: (2)

Anyone know what's good for AWD with 225/45/18 all around?

tfz_hebe89

iTrader: (1)

I have no warning light ATM, but I see the sidewall is a bit low..maybe it's best to keep it at 38? how does it feel with 38-40 psi all around?

slee18

iTrader: (1)

I would go 38 front and 40 in the back. probably best for ride and handling

Joe Z

iTrader: (10)

For my 19" tire sizes.. (see my sig)

I run 36psi on the fronts and 38psi on the rears

- Of course be sure to always set tire pressure when the tires are "Cool"

- Also, be sure to check your tire pressure at least ONCE A MONTH....

^^ I would day 35lbs all around should be comfortable for your AWD...


- Joe Z

tfz_hebe89

iTrader: (1)

"when the tires are cool" - I assume it's in the morning before it's driven for the day? but when I drive 1 mile to the tire shop and adjust it there, will the tires be hot after being driven for 1 mile?

Joe Z

iTrader: (10)

You should be OK... just drive normal and not aggressive...


Example - the other night I filled my tires up with AIR at the nearest gas station off the freeway... My tires were HOT of course...
I added a few extra lbs in each tire...

The next morning I adjusted my 4 cooled tires pressure DOWN to my desired .lbs.., before leaving for work.

Joe Z