When I test drive mine today, I want to check the tire pressure first.
What should it be?

 

I've read 32

 

Check the owners manual, should say there.

 

A sticker stating the correct pressures is located on drivers side door sill. (32# front&rear)... 1200miles sofar and lovin it more every mile ...

 

It should state it on the tire also.

 

I believe the tire only states the maximum pressure, not the correct pressure for a given car.

The Boss Hog

 

I believe the tire only states the maximum pressure, not the correct pressure for a given car.

The Boss Hog [/b][/quote]
Correct, all tires are branded with the maximum tire pressure for the tire, follow the door or glovebox placard for correct inflation pressures for your vehicle, it may also be posted on the fuel door also.

 

Old racers trick:
1) Fill the car with gas and air tire to 40#

2) Go to a nearyby large open area or untraveled sidestreet (don't want to heat tires).

3) Take a 1" piece of chalk and run a stripe from inside to outside of each tire across the tread.

4) Move car (forward or backwards) 10-12 tire revolutions.

5) Chalk mark should be more worn off in the center than on outside edges showing a overinfalted condition. Lower pressure 2-3# and log.

Repeat steps 3-5 until you get an even chalk wear pattern on all 4 tires. Withing 10-15 minutes you have a baseline cold airpressure with you driving. This will optomize tire performance and gas mileage for any type of vehicle; well .... short of an APC.

Repaet with any new set of tires OR if you gain or lose ~150#.

BTW this won't work very well if it's wet or snowing outside (actualy know someone who tried).

 

18psi ...oh you mean for regular driving? 32psi sounds about right then :P

 

Try 35lb cold, firms them up a bit.

 

Like they said....32 psi. That's what I do and works great for day driving.

 

65lbs !!! <plugs ears and runs>


or 32..
one or the other

I'd stick with the 32 thats printed on the sticker inside the door jam.

 

Stock car (door sticker) is 17" P235/55....32psi

Does this still apply when you change the tire/rim package?

I've got 20" P275/35 &reg; and P245/40 (F)... 32 psi just "looks" under inflated.

 

whats it say on the tire?

 

Only the maximum pressure is on the tire...51psi

 

Ill look in my magic book when I get to work tomorrow and see what it says.

You need to match up the stock tire load at the recommeded psi, then look in the book for your new tire size and what the load capacities are of that tire at what pressure.

My guess is going to be pretty close to max for such a low profile tire, but Il look tomorrow

 

My guess was right. The stock tire and psi load rating is 1587.
your 20" tire at 32 psi had a load rating of 1279!

So if you put the 20"s at 51psi which i think is what you said the max psi was it wold have a load rating of approx 1557. Which is a tad lower than stock, but still alot closer.

watch them pot holes!

 

It used to be that when an inflation was in question and you had NO way to measure the pressure that one could stand on a side view of the tire and you should see the bottom and the side clearly with no buldging , so I tried it and was generally close.