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Old 08-15-2012, 08:06 PM   #1
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Another PSI Question

I recently purchased new tires and rims for my 2007 GT mustang (stock) and I noticed the pressure getting low and want to refill the tires, but I was curious what the best PSI is for the new tires?

They are 18x9 rims, with 255-45-18 tires on them.

I wanna say I remember putting 40 originally, does that sound right?
It was off my cousins suggestion so I don't really remember, but would 40 psi be about right for the setup?

Thanks
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Old 08-15-2012, 10:42 PM   #2
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There should be a number on the door. But if you think about ask at NTB or Discount tire.
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Old 08-16-2012, 08:06 AM   #3
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Re: Another PSI Question

I read somewhere it was like 34 front and 32 back. If your staggered. Wider tire needs less.
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Old 08-16-2012, 08:12 AM   #4
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All depends on your preferences. I run my front street tires at 35 and rear at 20 for normal driving. I don't like to spin
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Old 08-16-2012, 08:32 AM   #5
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Re: Another PSI Question

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Originally Posted by lowflyn View Post
All depends on your preferences. I run my front street tires at 35 and rear at 20 for normal driving. I don't like to spin

Those 17s or 18s? 20 seems low, does tire wear normal?
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Old 08-16-2012, 08:40 AM   #6
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Quote:
Originally Posted by jdavis96gt

Those 17s or 18s? 20 seems low, does tire wear normal?
305/30-18 and I don't worry about tire wear...
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Old 08-16-2012, 10:25 AM   #7
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Re: Another PSI Question

generally i would run 32-36psi~ keep an eye on the wear pattern middle vs outside of the tire and adjust as needed. More air = more middle wear
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