Air pressure for trail grapplers - Chevy and GMC Duramax Diesel Forum
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post #1 of 4 (permalink) Old 11-04-2019, 06:53 AM Thread Starter
Tstoute's Avatar
Join Date: Nov 2019
Location: Louisiana
Posts: 3
Air pressure for trail grapplers

I’m running 285/55/22 trail grapplers on my 2016.whats a good air pressure to run so my tires don’t eat away?

Black 2016 SLT 2500HD stock
3.5 Ready Lift
285/55/22 Trail grapplers
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post #2 of 4 (permalink) Old 11-04-2019, 08:22 AM
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Join Date: Oct 2013
Location: Florida
Posts: 511
I normally run 10 to 15 psi under max pressure up front and 20 to 25 under max pressure in the rear, that is when unloaded of course.
You can always do the chalk test if you are unsure what pressure to run.

With some stuff.
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post #3 of 4 (permalink) Old 11-04-2019, 12:14 PM
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Join Date: Aug 2019
Posts: 222
I run 70 cold adjusted year round. Meaning 70 psi cold at 80 ambient and 70psi cold at 45 ambient. If loaded go to 80 psi cold ambient....

Just did my winter adjustment when I had to replace a tire couple of weeks ago. Ruined it at the ranch

2020 GMC Denali 2500
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post #4 of 4 (permalink) Old 01-20-2020, 09:13 AM
Join Date: Oct 2016
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What's the chalk test? I have been running my Toyo AT2's @ 65 psi all around when running empty. They seem to be wearing quite nicely actually although oddly they start howling around the time a rotation is needed. That I found interesting.

2007 Silverado LBZ,CC, short box, 4x4, Cat fuel filter Adapter, otherwise all stock (for the moment)

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