Tire Size and Ideal PSI for Road Driving - Second Generation Nissan Xterra Forums (2005+)
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post #1 of 9 (permalink) Old 03-03-2019, 12:15 AM Thread Starter
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Tire Size and Ideal PSI for Road Driving

I just got my 2013 pro4x a couple weeks ago I have BFG all terrains LT275/70R17 on it anyone know what the best psi i should be riding them on for the on road driving?
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post #2 of 9 (permalink) Old 03-03-2019, 12:52 AM
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Look at the sticker on the door sill, it will have the manufacturer recommended psi. Mine is 35 psi; 2011 Pro-4x with 265/75/16 tires. When I had the stock BFG Rugged Trails I ran them at 35 psi. That being said, when I had BFG KO2’s I ran them at 40 psi. And my new Falken Wildpeak ATW3 are inflated to 38 psi (which is what America’s Tire recommended)
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post #3 of 9 (permalink) Old 03-03-2019, 08:01 AM
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post #4 of 9 (permalink) Old 03-04-2019, 01:10 PM
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Tire width, height, load range, truck weight, and a few other factors help determine your PSI.
E.g. I run my 315/75/R16 tires at ~30 PSI road. My 285/75/R16 winter tires I run at 37 PSI. In order to really figure out the correct pressure, you need to do the chalk test like @Longboardr mentioned above.

OR you could just run them at ~36-37 PSI which is stock and you will probably be good enough
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post #5 of 9 (permalink) Old 03-05-2019, 01:03 AM Thread Starter
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Thanks all I am new to the bigger tires didn't know if I should follow what the door says or not.
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post #6 of 9 (permalink) Old 04-19-2019, 03:03 PM
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The factory 35 is a good starting point. Lots of different size tires used across the Nissan truck line and they all have the same 35 PSI recommended pressure.

The chalk test is good for setting a baseline on a race car, but I have seen it flawed for the street. Usually too low.

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post #7 of 9 (permalink) Old 04-26-2019, 02:13 AM
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for max MPG... 40 PSI is a good place to start... avg 17 with 33's and wheeling.

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Last edited by ZheKing; 04-29-2019 at 09:52 AM.
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post #8 of 9 (permalink) Old 04-26-2019, 01:02 PM
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I've been running 39-40 psi on my 285/75/R16 (33") KO2s in warmer weather, and a few psi lower in cold weather. They are a little stiff, but that's what you get with E-load tires.

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post #9 of 9 (permalink) Old 04-26-2019, 01:52 PM
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I run my 285-76-16 tires at 32 psi. Chalk test indicates I should run them as low as 30 psi. If I run them at 35 psi or higher my traction control becomes an annoyance and comes on randomly on turns. My rig seems to handle better with lower tire pressure.
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