Dually questions

[hedge]

Moving up to a dually and don't really have any experience with them so I have a couple questions.

1. I level by driving onto blocking, for the rear tires do I need to put blocks under both duals or being a static load when stopped is it ok under just one?

2. Do I need valve stem extensions or something to be able to add air to the tires?

3. No immediate need but what's involved if I would like to put on wider tires? I assume the dually's need a certain amount of space between them.

4. Do you run the same pressure on both dual wheels? I saw somewhere to run 3psi less in the inner dual to account for road crown?

Sorry if these are stupid questions, pretty green with duallys. If you have any other advice feel free to add it.

[zb39]

1 block is good.
I don not have any extensions. I do have steel valve stems though.
You can go a bit wider. To go a lot you need a spacer between the wheels.
I try to run the same but it does vary. I have a readout on all 6 in the EVIC. Sometimes there is 10psi diff.

[Kayteg1]

1 if you read about the tires, they can take static load like 5 times rated load, so you can put block only under 1 tire, but that will give you extra flex. Your call
2. each system is different. I had straight chuck for decades as this was the best for all dualies, but it will not fit on new Ford. Extensions can be additional source of troubles, so stay away from them unless you have TPMS.
3.don't think wider duallies are option, but you can find super-dual or whatever they call it.
4. same pressure. You can buy pressure equalizer, what IMHO combined with added TPMS is the best of all worlds.
I own duallies for years, but lately it is my primary vehicle. Looking at SRW truck, I am getting impression that it is unfinished. 😉