lowKut

iTrader: (3)

What is the safest/max PSI I can run my tires at to best protect my wheels?

Don't want to put too little to not protect the rims and not too much to make it easier to pop.


Tires: 235/35/19 245/35/19

LiCelsior

iTrader: (32)

at least 40psi.

lowKut

iTrader: (3)

40 PSI is the max?

akarils

The tire sidewall should say what the max psi it can handle. Also keep it mind that air pressure expands in warm tires so if the tires are still cold then you have to compensate for that fact (like go 35psi on cold tires that are rated 40 psi max).

lowKut

iTrader: (3)

Great info.

Many thanks!!

Mark

tmf2004

iTrader: (15)

I'm running 36psi in my new 20'' tires...

In my old setup(19's) i ran 40psi front and 35psi rear.

mitsuguy

iTrader: (2)

Actually, there is some incorrect information in this thread...

The sidewall of the tire has the maximum cold air pressure listed on the side. Generally between 35 and 51 psi for most passenger car tires. Passenger car tires carry their maximum load at either 35, 36 or 41 psi, depending on the tire's load designation. You may feel free to inflate your tires to the maximum pressure when cold. When hot, you can safely add 3 psi to this.

Now, here is the deal - the higher the air pressure, the GREATER chance you have of an impact damaging the tire. The higher air pressure may offer a little impact protection to the wheel, but not by a whole lot.

Anything over the air pressure at which the tire carries the maximum load is just for adjusting the way the tire handles and how much it rolls over under hard cornering...

With years of personal experience in this, somewhere between 35 and 40 is the sweet spot for most low profile tires...

GS4_Fiend

iTrader: (22)

Depends on the tire. Read the MAX PSI on the tire and try to stay at least 5 psi below the spec. On my 19's Hankooks V12, they are 51 psi MAX, I run 42 PSI. But that's just me. I like it stiff

SoCalSC4

Agreed. I've been in the wheel business for over 15 years - no amount of pressure will effectively "safeguard" your wheels. It's a good way to get a sidewall bubble, though.

Mostly, running over 40 psi on these cars does nothing but kill ride quality. If you were tracking the car you might run higher, but you would only be able to tell this by chalking the tires, getting them up to temp, and running a few laps.

I run about 38 on my GS, and this is only to attempt to 'crown' the tire a little to combat a bit of negative camber. It doesn't really help much.