When it's time for new tires, if you choose a non-OEM or different size what tire pressure information should you use? The info on theOuttiedoor jamb or on the new tires?

I have alwaysheard that it is recommended to inflate the tires on a new car accordingto the info on the door jamb, but I've never heard anything about replacement tires. Since a new set of non-OEM tires will have different chararteristics (density, temp & speed ratings, tread depth) wouldn't the tire manufacturer info be more pertinent?

 

When I was looking at the toyo tire guide for the outlander 07 xls I notice that on there website there's a note saying 'NOTE: Replacement pressures (front and rear) need to be 33 PSI front and 33 PSI rear to carry the same load.' So I presume that it should be the same for other tire brand to so you achieve the right carry load ect...

 

Roach,
You could be on to something. Do you have Toyo's as OEM tires? If so, what does your door jamb placard say for tire pressures? 33PSI?

I have the Goodyear LS1's as OEM. I'll check my tp ratings and see if they are the same. If so, then the tire pressure ratings may be based on the vehicle dimensions/weights/etc rather than the tire type/make/design...interesting.

I'll get back to ya.

 

I don't have the Toyo I was thinking about getting a set I have the OEM goodyear LS2 and your supposed to use 32psi by spec in the door jam.

 

Oops my bad, mine are LS2's also. Anyone else have an XLS with another brandOEM tire on their 18" wheels?

I know that different tires are spec'd for the same make of vehicle depending on where it's built (state/region). Sometimes even the vehicle year will vary for OEM brand used. I'll have to hit a dealer lot and look for the same vehicles with different OEM tires and check the door jamb info.

 

I don't think that you'll find any difference between the recommended tire pressure on vehicles with different brand tires. Although different brand have different characteristics, a change in temperature or road condition probably have a larger impact on the pressure you should use.

 

Remeber the pressure on the tire sidewall is a MAX inflation pressure. I personally like mine at 35 psi. Getting better wear, better milage and less noise than at the factory spec.

 

chenarm,
Good points. The change in road surfaces around here probably makes the tire pressure rise and drop all over the place. Concrete to asphault, smooth blacktop to brick, dirt to gravel. Plus speed's a big factor as well. I guess it's all relative and i should pay more attention to tire wear, rather than pressure.

 

Yep tire manufacturers have to work to standards, and there isn't enough significant difference between one brand and another where you would have to vary pressure from the manufacturers OEM settings.

Like chenarm says, way too many other variables affect pressure more, especially ambient temperature. For instance, down here in FL, when we've had a sudden rare cold snap come through, I've even had the low pressure light come on.

 

tire pressure on the tire is a MAX pressure.
the pressure recommended on the door jam is the pressure the engineers of the car dertermined to be the best for overall wear, traction, comfort, etc.

use the door jam pressure.