Most of us only deal with ice in our drinks or as used to get our beer cold but some folks may find themselves wanting? to drive in areas where roads get snow and ice covered and even in areas where the use of chains is required.
The question is; What does the RV owner do when it comes to using chains in the dual application?
If we choose to travel in such areas, it is important to have the correct type and size of "chains" for our application or we may end up doing damage to both our tires and the side of our coach.
There are a variety of types of chain set-ups and even some alternatives such as "cables". I cannot address the legality of the alternate styles in all areas other than to offer that if there is an advisory that chains must be used and you get stuck and do not have chains on the unit you may face some fines and other penalties so you need to confirm the details of the requirement in your area before spending your money or before traveling out and about on snow and ice covered roads.
If you do not have duals your choice is to be sure you select the equipment correct for your size tire.
Duals have a few options. There is going to be a difference in cost, weight and ease of install so you need to do some research.
There are "Triple Rail" as seen in this video. There are some "cable" type systems as seen here, and some newer designs as seen HERE .
I have not been involved in any direct comparisons so cannot offer any advice on relative performance. For that, you may need to do some additional investigation on the internet or even talk with some over the road drivers. Looking at the different videos it appears to me that some designs may be more durable than others.
I do know that driving on dry roads with chains can cause some serious tire damage so only you can properly evaluate what system would be best for your situation.