"OZ" Tire Designation?

[HoveringHMMWV]

What does the "OZ" stand for on the Goodyear MT OZ? Does "OZ" = 8-ply?
Thanx,
- HoveringHMMWV

 

[simp5782]

What does the "OZ" stand for on the Goodyear MT OZ? Does "OZ" = 8-ply?
Thanx,
- HoveringHMMWV

Ozone stable tire

designed for long shelf life, and able to withstand sun without oxidizing and cracking.

 

[frank8003]

What does the "OZ" stand for on the Goodyear MT OZ? Does "OZ" = 8-ply?
Thanx,
- HoveringHMMWV

from my long time ago notes.......
Ozone, along with oxygen and ultraviolet light degrade and eventually destroy most types of rubber over time. Rubber formulations ("recipes") contain chemicals designed to slow down this degradation.

These anti-oxidants / anti-ozonates slowly bleed to the surface of the rubber part and form a film or barrier. The oxygen and ozone attack the chemical barrier rather than the rubber under it. It is a sacrificial layer and must be replenished to work over time.

If it is a dynamic rubber part like a tire or engine mount, when the vehicle is operated, the rubber is flexed, it warms up and more chemical bleeds out to to surface of the rubber. If the vehicle is parked for a long time, the sacrificial barrier is used up, but not replenished. This is what causes tires to "dry-rot".
It shows up as cracks in the sidewall and between the tread bars.

The anti-oxidant/anti-ozonate chemicals are expensive so a minimum amount is added. Because the military expects vehicles to sit a lot, the DoD may specify a higher percentage of these chemicals be added.

 

[frank8003]

post #9 in here

preserving tires

Are there any tried and true ways to keep new unmounted tires in good shape?

www.steelsoldiers.com

 

[frank8003]

There is good information about ozone vs tires in TM 9-2610-200-14

Open the attached PDF and push Ctrl and the letter F at the same time to get a search box upper right and type ozone in there for over a hundred mentions.
Works with all PDF

Don't know about phones but always works in puter

 

[frank8003]

A Thesis on rubber, tires, chemistry, and 258 mentions of ozone

 

[frank8003]

some in here too

Tires, how cracked is too cracked?

Good tip maddawg Thanks!, Hope mine never get that bad..

www.steelsoldiers.com

 

[eaw46]

Some of the OZ (Australia Members) have had good luck with using SPF 50+ Sunscreen applied on tyres and dash pads to prevent drying and cracking. It will last for a month or more if put on and it does not rain.

 

[Milcommoguy]

There you go... HumV now smells like a banana or a coconut.

Still loud inside, CAMO