Tire psi

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Dec 11, 2020 | 09:23 AM

cullenkyla

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Tuned

Joined: Sep 2004

Posts: 412

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From: Auxvasse Mo

Tire psi

What the correct tire pressure you should run in 285/60/20? That is no load everyday driving. 2018 KR 3.0. Thanks

Dec 11, 2020 | 09:41 AM

GABAR

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Joined: Dec 2016

Posts: 5,650

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From: GA

Quote:

Originally Posted by cullenkyla

What the correct tire pressure you should run in 285/60/20? That is no load everyday driving. 2018 KR 3.0. Thanks

Look at the sticker on the jam.

Dec 11, 2020 | 05:48 PM

SpencerPJ

Fleet Mechanic

Joined: Jan 2020

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Drivers door tells you the best. Never lower, maybe a bit higher will get better handling and mpg.

Dec 11, 2020 | 08:00 PM

JEMOORE1962

5th Wheeling

Joined: Jan 2013

Posts: 27

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i had a 2007 ranger run 5 over psi tires had 103000 miles on tires befor trans went out at 283000 miles

Dec 11, 2020 | 08:03 PM

muhford

Fleet Mechanic

Joined: Mar 2014

Posts: 1,268

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From: Missouri

Run stock tires at the PSI on the door pillar. Larger tires you should do a chalk test.

Dec 12, 2020 | 03:36 PM

cullenkyla

Thread Starter

Tuned

Joined: Sep 2004

Posts: 412

Likes: 7

From: Auxvasse Mo

Running 40 psi sounds like that's where I need to be. But the chalk test sound like that would be a true test how much rubber is on the road. Thanks everyone

Mar 29, 2021 | 10:39 AM

NoImMad

Junior User

Joined: Feb 2021

Posts: 63

Likes: 9

From what I can see on those posted door stickers, the different tire pressures listed are in direct relationship to the also posted weight/payload capacities so simply asking "what pressure is best" is not the question to ask. It is is, as we should all know, specific to each situation

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Mar 30, 2021 | 06:46 AM

SpencerPJ

Fleet Mechanic

Joined: Jan 2020

Posts: 1,363

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Quote:

Originally Posted by jimmy-six

I run the Max on the tire on all my cars..

Ouch, moma would not like that stiff ride. me neither.

Mar 30, 2021 | 08:25 AM

#10

Robbgt

Logistics Pro

Joined: Oct 2004

Posts: 4,738

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From: FL

Quote:

Originally Posted by SpencerPJ

Ouch, moma would not like that stiff ride. me neither.

Same, I run mine at 35.

Mar 30, 2021 | 01:26 PM

#11

Bluegrass 7

Lead Driver

Joined: Sep 2006

Posts: 7,907

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On trucks that have tire pressure monitor in dash dispay to call up; it's an education on how each tire moves in pressure from cold to hot and under driving conditions and large temperature changes.
Tire pressure almost becomes relitive after a cold start.
After awhile you could begin to detect a tire that heats up at a different rate and even a monitor that is 'off' from the other three if you set all four with a good digital gauge and watch the trend long enough over many drive cycles.
A lot goes on with the tires we never suspected in the past without this ability to see it..
I have the same issue with 'mom' objecting to hard hits so lowered the tire pressure for accomidation.
What we need to understand is the trucks are shocked a bit stiff OEM.
Otherwise I get 21 mpg on a 2018 5L on lowered cold tire presuure that only rises back to 35 +/- during driving. Handling is not 'substancially' different.