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I have a set of Nitto Trail Grappler M/T 35x12.5x18 on my 2015 JKU, what tire pressure should i run for everyday use?
 

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Depends on a couple of factors.
How wide are your wheels.
How heavy is your jeep.
Do a search on chalk testing and that will help.
Most will find somewhere in the 28-30 psi range +/- 3
Good luck.
 

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Yep, somewhere in the vicinity of 30 PSI is safe for most tires. More pressure will increase fuel economy and handling at the expense of ride quality and footprint. Adjust according to what is more important to you.
 
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