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Old 03-19-2012, 07:39 PM
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Is 40psi to much for Discoverer AT3?

I just realized my powdercoat shop set my tires at 40psi. They are discoverer AT3 265-65-17. Can you guys confirm I should lower them at least to 37-35 psi?
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Old 03-19-2012, 08:44 PM
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Re: Is 40psi to much for Discoverer AT3?

Too high if it is cold tire pressure. 40 psi when tires are warm/hot is fine. You expect the pressure to go up approx 1 psi for every 10 degree rise in temp!
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Old 03-19-2012, 09:19 PM
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Re: Is 40psi to much for Discoverer AT3?

What PSI range is stated on the side of the tires?
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Old 03-20-2012, 07:45 AM
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Re: Is 40psi to much for Discoverer AT3?

It says up to 44psi, so I guess 40psi would be ok.
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Old 03-20-2012, 08:13 AM
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Re: Is 40psi to much for Discoverer AT3?

If the sidewall says 44psi that is the max for the tire. I always stick close to the number on the door sticker or manual.
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Old 03-20-2012, 09:23 AM
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Re: Is 40psi to much for Discoverer AT3?

I will try lowering them to 35 and see what happens. They do feel hard...
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Old 03-20-2012, 10:50 AM
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Re: Is 40psi to much for Discoverer AT3?

I like the firm ride @ 37
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Old 03-20-2012, 08:57 PM
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Re: Is 40psi to much for Discoverer AT3?

Quote:
Originally Posted by nek121328 View Post
I like the firm ride @ 37
I lowered them to 37 and I love it, thanks so much for the advice.
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Old 03-20-2012, 09:02 PM
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Re: Is 40psi to much for Discoverer AT3?

I go with 37 is just right but once they get hot driving the psi will be 40,check them after driving and see.
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Old 03-31-2012, 09:09 AM
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Re: Is 40psi to much for Discoverer AT3?

My Overland came with 40 psi from the dealer so I dropped them to 36 the next day at home, cold. I agree that a few pounds over the door recommendation is probably best trade off between ride and handling. Will see how these Michs Laitude Tours 18" work out. They use nitrogen in the tires at the dealer so I don't expect much leakage. Most of my driving is highway in the Rockies so expect them to do ok for awhile - not sure how they'll do in winter on snowpack. Unlike a lot of vehicles that ship with low grade tires these seem to rate pretty good on TireRack.
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