What's this tire wear about on these Hankook's? The inner tread blocks on the rear tires are intermittently "lifted". Some treads are standing higher. Its just the inner rear treads. The outer treads look normal.

Out of balance tire?

Inner tire treads:






Outer treads on same rear wheel:

 

What is the condition of your shocks?

 

They only have maybe 20-30k miles on them..

 

These tires were on the front axle at one time? Those tires are ready for replacement anyway, look at the dry rot.

 

I would be replacing them before they blowout, the weather-checking will cause a blowout sooner than the tread wear.

https://www.ford-trucks.com/forums/1...l#post14693576

 

Sure but they are six years old...

 

Are both side like that, insides worn more than outers?

 

yes both sides are that way and yes youre all correct....they need to be junked because of age.

The spare tire was 18 years old when I finally junked it...

Someone send me a check for $500...

But what causes that kind of wear?

 

Id run those tires.

Check your leaf spring center bolts. Sometimes they can shear (in the middle of the pack, top, or bottom) or, shift if loose, or if they have been jarred very hard (wreck). If the center bolts are "off center" then the rear axle wont be square with the rest of the truck. The u-bolts are tight enough to keep everything in place and the front tires will pull the truck in a straight line and the tires are wearing in the back due to the axle angle.

 

You mean these?

 

Those are the nuts on the u-bolts. He's talking about the center pin that gos through the spring pack itself. In the center of that plate that you both are bolted to I believe is one side of the pin.

have you jacked the rear end up and checke for any play in the wheels or axles? Are the individual leaves in the spring pack all intact and accounted for? I had a leaf on each side breakon mine.

 

Ill need to doublecheck. I didn't notice any abnormal play when I changed the rear rotors, pads, shoes, hub bearings, oil seal and brake lines last weekend.

The leaf pack is original from 2002....I did swap out the axle 5 years ago.

 

Another thing to look at is a worn bushing in the front mount of the leaf spring.

BTW, you could run a tire groover over those "weather checked" areas and it would expose fresh un-checked rubber underneath. There is a 1/4" of rubber below those grooves before the bands show. Some tires (Michelin) are notorious for weather checking faster than others. To say that a little bit of external cracking degrades the internal belt integrity of a load E (assuming) is asinine, as well as having a 6 year shelf life. What? Do the steel bands in the tire and bead rust or degrade with age, regardless of miles? Thats what the tire manufacturer wants you to think.

 

The tire manufacturers, like other big industries, convinced/bribed the CA legislature into rules that serve their interest. For example tire shops here cannot make any repairs on tires more than 8 years old. Or repair a puncture regardless of age unless it is located between the four center ribs.

Hmm, maybe I should insist on that when we move to Montana, or Idaho...

 

To me it looks like the couping was caused by having them on front and git rotated to the rear after it happened.
If you rotate them on to the opposite sides it will straighten out.