Pickup truck tow vehicle stability tests
Always lots of anecdotal statements on rv.net around dual wheel vs single rear wheel "stability". Anyone have any links that point to actual testing results under controlled conditions?
Forum Discussion
RinconVTR wrote:
Take the stability of 2 rear tires and multiply by two...give or take.
OP, am we missing something? Is there a hidden question here?
Wow, not even close to reality. By this logic is we fit the entire length of the axle with tires (say 8 tires) it will be 8 times as stable (it's not).
The answer is yes, dually's are more stable but as long as you are within weight ratings, there is no safety issue. SRW trucks don't fall over because they are missing the training wheels. You would be very hard pressed to document a situation where a SRW would roll but a dually would stay upright while towing.
I suggest you start watching semi's. You will notice a great many are going singles (a little difference as the outside width is held steady). If they were falling over left and right, trucking companies wouldn't use them. That is about as objective as you can get on the subject.
The reason to get dually's is because you need the extra load capacity.
