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Old 07-25-2013, 08:29 PM   #1
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Help on psi

I just received my Black Rhino Rockwell 17x9 wheels with Fierce Attitude MT 285/70R 17 tires from Discount Tire Direct. Sticker on tires says filled to max psi. What psi should I run. 100% street use

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Old 07-25-2013, 08:30 PM   #2
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33" tires = 28-33 cold psi.

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Old 07-25-2013, 08:33 PM   #3
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Thank You
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Old 07-25-2013, 08:34 PM   #4
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More air= better milage
Less air= softer ride
experiment find happy middle ground and use chalk...
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Old 07-25-2013, 09:18 PM   #5
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I run the duratracs at 38.
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Old 07-25-2013, 09:24 PM   #6
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I was wondering this too. I just put on 33/12.5s and have lost over 3 mpg from the stock 32s. I'm thinking they must be under inflated because I can't see the few extra pounds per wheel cutting more than 15% of my fuel efficiency. Haven't done the chalk test yet though...
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Old 07-25-2013, 09:25 PM   #7
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I did the chalk test when I had 33s,35s and 37s...I always end up at 28 psi
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Old 07-25-2013, 09:28 PM   #8
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Cold Pressure

I run that size tire at 32PSI cold.

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