heyarnold69

iTrader: (1)

Ive been running with my 19" tires at 40 psi .. anyone recommend anything different?

Charles R. Hill

iTrader: (7)

Read the side of the tire........

Razz1

Check tire rack.

swoope

iTrader: (5)

read the owners manual. then the sticker on the inside of the door. then the tire.

decide which one is likely to be the right one.

btw, the tire and the rim dont know what size they are.

beers

wassup_nuthin

do you like traction? if not leave it at 40

TeamRX8

iTrader: (25)

30

.

heyarnold69

iTrader: (1)

ive been making adjustments from 35 to 45. 40 seams to work nice and there is less sliding in wet conditions.

nycgps

iTrader: (1)

if you want to die keep it at 40.

you're over inflating it by too much, even in 19in size.

Bishop

What should the stock 18's psi be? (the 8 is in Ontario, I'm in BC, so please refrain from telling me "check the side of the tire", thanks!)

StealthTL

iTrader: (1)

.......8 is in Ontario, I'm in BC.........

Unless you have a 2000 mile long airhose, it doesn't matter!



S

MazdaJeff

Higher pressure should give a bit more gas milage. Depends what your using the car for.

Bishop

LOL Point taken. I was just curious cuz I'm out here, my baby's out there and I just want her to know that I'm thinking of her - she checks the posts through her GPS Nav and PCM so I know she's watching.

Spinning Sushi

iTrader: (21)

I believe that it's 32 for stock.

Bishop

32? Sweet.

mysql

32-35 is what I use

swoope

iTrader: (5)

what he said.

i run 34 on the road. works well.

beers

BlueRenesis82

Dude, you know more is better. 55 PSI all the way!

nycgps

iTrader: (1)

If you have 55psi, Remember to hit every single pothole u see !!!

To be named later

Although it gives a much stiffer ride, I like to run at 75 psi. I like to compensate for the rougher ride by inflating with helium.......seems to make the car a little lighter. If the car starts getting airborne, I just attach some ankle weights to the axle. Seems to do the trick.

NgoRX8

iTrader: (1)

i do 34 for daily driving.

Outkast187

40 is fine, a little less rolling resistance. 30 is mushy for my taste, 35 is a good medium. But, I do run 55-60 psi on my 13's on a 5500lb car, so maybe Im not the one to ask....lol.

Jax_RX8

Another thing to consider is your camber settings. If you have lowering springs (which creates more camber) or just have more dialed into you alignment, you should consider running less Air pressure - around 30-32 psi max if you want any tire life at all. Higher pressure will not allow to tire to "sit down" on the rest of the tire and will burn up the inside edges much faster than when running lower pressures.

RenesisX-8

iTrader: (1)

actually, from my own experinces, running lower pressure makes the outer treads wear more in street applications. running more pressure makes the middle wear more. running the right amount of camber and 30-35psi cold seemes to help tire wear and provide a good ride. inflate to 35-40 if you are getting outer tread wear, or are in colder climates. I dont know if you would gain any fuel mileage by over-inflating your tires... alignment would have the greatest effect on that.

On 19's I would want to run in the lower 30's range to give a little more cushion between the rim and the road surface.

swoope

iTrader: (5)

the one time size does not matter!

beers

Jax_RX8

You are absolutely right for a normal alignment.

But you missed my point - when you lower your car via lowering springs or have added more camber into your alignment on purpose to support better cornering, this does cause more inside tire wear independent of pressure.

I am just stating that lowering the pressure some will allow the tire to sit down on the rest of the tread (not just the inside) to make the wear a little more even. This will cause more total grip as well, but may increase rolling resistance some (but unlikely to effect gas mileage much)

Just something to consider.