37x12.5r17 Mastercraft MXT

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adventurer

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just upgraded from 35s to 37x12.5r17 Load range D on my 2010 crew cab 1500 , I wonder what is the proper tire pressure ?
 

JB1

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Mine are E rated but I run 45 front and 40 back

Post some pics
 
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My door says 40 psi
Tire dealer says 28 psi
 

muddy12

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Best way to determine the proper pressures for you specific setup, is to “chalk test” your tires.

1: Get some chalk(kids sidewalk chalk works well).
2: Find an empty parking lot.
3: Mark a stripe across the tread of the tires.
4: Drive straight for a bit.
5: Check the chalk stripe.
6: adjust tire pressure as needed.

You want the chalk to wear off evenly across the width of the tire.
If the center wears first, pressure is to high. If chalk wears at the edges first, pressure is to low.


Sent from my iPhone using Tapatalk
 
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adventurer

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I raised the psi from 30 to 40psi I noticed better rolling but not as comfortable on bumps as when it was 30 psi
 
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adventurer

adventurer

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I received this from cooper tires78D4049B-8D89-495C-B2E5-74551057721B.jpeg
 
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