Dually Tires

[geeksrus]

I replaced the front tires 3 months ago with Good Year Wranglers. Now, my two outside rear tires need replacing. The inside two still have 5/16" tread.
Am I okay just replacing the outsides & getting replacements for the insides later?

Thanks
Eh!

[94-Newmar]

Oh no! Duals should always be replaced at the same time. The new tread will cause a diameter difference that reduces your load capacity on the pair. It would be like putting on 2 different size tires.

[RustyJC]

As mentioned, duals should be replaced in wheel pairs at a minimum - that is, both tires on the same corner of the truck should have the same loaded diameter. If not, the larger tire will carry a disproportionate share of the load, and the larger tire will skid the smaller tire (which wants to turn faster due to its smaller circumference) along, causing it to wear even faster.

Rusty

[Ray,IN]

There is yet another side to what Rusty said. The larger dual (new vs your 5/32) tire will wear faster too, because it is carrying most of the load. To a small degree, if you put new tires just on the outside, they do a little better because of road crown. Now this is splittin hairs, I would install 4 new duals.

[Tireman9]

You might consider two new tires on rear as matched pair. Move the two Gy Wranglers to the other side rear as another matched pair.

Then have the Goodyear dealer (you are dealing with a company store not a single site independent dealer aren't you?) inspect the 4 remaining tires and if they are OK and only a few years old put them on the front.

Also you have had your rig weighed so you know the correct minimum inflation to run based on your real loading for each corner haven't you?