PSI w/ Mud Terrian???

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Oct 4, 2005 | 08:22 PM

#21

nermalgod

Registered User

Joined: Sep 2005

Posts: 249

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From: Madison, WI

I seem to recall that the findings involving Ford Explorers rolling over and playing dead on Firestone tires were because of under-inflation; people airing down to get a better ride. We're talking about trucks and 4Runners here. If you can't handle a rough ride buy a sedan.

As for me, I run mine at 50psi.

Oct 4, 2005 | 08:31 PM

#22

Ironmike4x4

Contributing Member

Joined: Nov 2004

Posts: 3,572

Likes: 1

From: Upsate SC

Quote:

Originally Posted by nermalgod

I seem to recall that the findings involving Ford Explorers rolling over and playing dead on Firestone tires were because of under-inflation; people airing down to get a better ride.
.

Bingo

Oct 5, 2005 | 10:19 AM

#23

Flamedx4

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Joined: May 2004

Posts: 3,291

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From: 100 miles offshore as much as possible, & Springfield Oregon USA

Quote:

Originally Posted by Ironmike4x4

From this site I found out about the "chalk test" and tried it out on my BFG A/T's. I found that around 45 psi was the optimal for my tires. Too much and the center will wear quickly and give a rough ride. Too little the outside tires wear faster and loses gas mileage.

Bingo.
When I put on new tires, I just watch as the nubs wear off. Adjust until the tread surface wears evenly.

Note that on really big tires this isn't really possible. My 35s would need to be at about 12 pounds to get even wear. Rides like an old Honda 3 wheeler (bouncy bouncy mushy bouncy) at that kind of pressure, plus consumes gas like crazy. Rides the best at about 40, but then wears out the center of the tread face really fast. So I compromise, and rotate often.