Trulyvintage

Steer tire cupping on one ton dually tow vehicle problem and solution

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Front steer tire cupping on one ton dually trucks

I had new steer tires installed on my F350 Dually
about 4000 miles ago

American made Cooper Discoverer HT tires ...

I noticed cupping and had them replaced yesterday

An older guy recommended I lower the tire pressure
from 80 p.s.i. maximum to 65 p.s.i.

As I know, when you tow a trailer on some of the
Great American Roadways ....


The bouncing caused by the uneven road surfaces
tends to make the front end lift higher than the rear at times ....

Lowering the air pressure should keep
more front tire contact with the road and reduce or eliminate the cupping ....


Front shocks are o.k. .......




Jim drive.gif

Edited by Trulyvintage (see edit history)

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Just in my opinion, the first thing that I would confirm is that the front end alignment. Not unusual to have a worn out part along with the alignment off. I would then keep the tire pressure at the maximum suggested pressure. Just my humble opinion and what I do.

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Just in my opinion, the first thing that I would confirm is that the front end alignment. Not unusual to have a worn out part along with the alignment off. I would then keep the tire pressure at the maximum suggested pressure. Just my humble opinion and what I do.

Bingo. The camber is out of spec. To much negative camber. Have the alignment checked. Sadly, once the tire starts to cup it will continue to cup and not smooth out.

Edited by avgwarhawk (see edit history)

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