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Tire Pressure
What is the proper tire pressure I should use in my Superformance Cobra w/ B.F. Goodrich tires?
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Hey Purepop:
Superformance says 18PSI all the way around for normal driving up to 25PSI for performance. Keep in mind these are big tires on light cars. You need to maximize the footprint, don't over inflate. I've been running 20PSI for 2 years and the T/As look like new! Bob |
purepop,
The Weavers told me 24-26 psi for street driving. I'm running BFG T/A's 255 x 60 and 275 x 60 15's. h dog |
i have been all over the board from variants of 18 front and 25 rear to 26/26. i finally settled on a range of 20-22 f/r except for long trips and i kick it up to 26 f/r. you will get as many different answers here as there are combos available. play with it, anything over 26 though in my car and you can drive over a dime and tell if it is heads or tails. bill
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Like the post above, I have tried many different tire pressures and combinations of tire pressures. Is there any prevailing wisdom as to how to determine how low one can go without running a danger of dismounting the tire from the wheel in hard cornering? I normally run 20-28 lbs.
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You've got to deal with a bunch of "depends" here, and that's not what you wear for bladder control problems.
First off, tire brand doesn't mean much when it comes to tire pressure, but tire size means a lot . . . the bigger the tire, the less the pressure. The same applies to tire load, but is directly proportional . . . the more load, the more pressure. What you're going to use the car for is very important. Racing requires higher pressures than for the street. But to arrive at the correct pressure requires a bit of testing to say the least because camber is also a factor under racing conditions. For the street, camber should be about straight up--a little negative at the rear--and pressures generally in the mid 20s at the front and high 20s at the rear. Keep a close eye on tire wear whatever pressures you run. Wear at the edges means too low pressure and wear in the middle means too high. So all I can say is try it and drive it, then makes changes accordingly. |
Boy, did I make a mistake. Front tire pressure should be a bit higher than the rears, or in the high 20s to start. Start the rears in the mid 20s and proceed as I said above.
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Ive been running 19 on the rears. I also have TA's. I am wearing more in the middle. Go to 18 like it says in the manual. (for the street)
I went 2 lbs higher in the front and they look like new. 6K miles. |
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They say 18, but with the yokos 21 works for me maybe a little stiff but wears good!
WldBil |
Some other things to think about...
The tire pressure at normal operating temperature is more important than cold tire pressures. Nitrogen helps with the tire pressure changes. Tire changers who use lots of soapy water are not doing you any favors. Fuel mileage goes down with lower tire pressure. Steering response decreases with tire pressure. Ride gets softer with lower pressure. |
do you guys know your answering a 7 year old thread?
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With that low of psi, don't you guys wear out the front tires fast ?
Meaning too high wears out the centers, too low the outsides. |
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I always kept an eye on tread depth wear,using a gauge.Making sure the tread is wearing even all the way across.Here in NorthEast with season changes and temp swings another reason to check.Hard to remember pressures.
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