driving dually with a flat?

Not an answer, but look into a Crossfire (or equal) tire equalization valve. It has a gauge for the dual on ea. side of ea. axle. I put my TPM sensor on the Crossfire and watch ea. dual's pressure from the cab.

You can drive a small distance at a reduced speed until you can get to a safe place and then change the bad tire, if there is a blow out you will hear the bang and you will hear the tire ripping apart, the RV will also be lower on that side.

Your RV should have a spare tire and you should be capable of changing it on the road, get a good 3 foot braker bar with an extension and the correct deep socket, a good strong bottle jack and a jack stand and a couple of wheel chocks.

Always chock one opposite tire and use the jack stand, safety first, also take some boards to set the bottle jack and the stand, and set the parking brake.

Should a tire blow, change it and when you reach the tire store have the mechanic check the tire next to the blown one by removing it and inspecting the side walls visually, if OK have them remount and re balance.

Always check the tire pressure on all tires, there are tire chucks that are longer and are specific for dually's, proper inflation is very important.

navegator

Have you considered buying a TPMS??

That may be the best couple hundred bucks you will ever spend.

No. Do not continue driving. The flat tire will tear apart and cause possible damage to your rig. The pieces of tire could damage another vehicle, or worse cause a serious crash.

To answer your question, no, it is not advisable to keep driving.
There will be friction between them and the remaining tire will be badly overloaded - resulting in damage to it.

As WyoTraveler mentions, you can thump the tires to see the one that is running flat, or you can purchase an Infrared Thermometer from Harbor Freight. Makes it very easy to check all 6 tires, not just the duallies.

Whenever we stop for gas, eating, or rest stop, I take a quick simple walk around. I aim at the tread about 6" off the ground and keep a mental note of the readings. The highest temperature is the tire with the lowest pressure. If it is more than 5* degrees above ambient, I get out the tire pressure gauge and double check.

I did stop in Nevada once and one side of the RV was warmer than the other because of the direct sun versus the shaded side. If you wish, you can take the temperature reading of the side of the RV and compare it to the tires on that side.

The flat tire will heat up because it's flat and the good tire will heat up because it's over loaded. Don't go too far too fast.

Buy a thumper at almost any truck stop. Every time you stop at rest stops etc. use it. It isn't going to tell you minor differences but you will locate problems before they become major.

The biggest problem with dually's is underinflating the inner. It is not easy to tell visually, so you really need to measure.

If you have to drive any real distance on a single rear, I recall reading that you should change them both out. Seems like the real key is to know how much your tires are rated for and to know your corner weights. If you exceed your maximum by more than 10%, I would consider that beyond a reasonable safety margin and I would replace both tires.

Jose