wnjj wrote:Huntindog wrote:Bedlam wrote:So now we are talking about modified trucks?
Maybe some us had really well performing SRW's that the delta between them and DRW is not that much. My F250 with modified suspension and 19.5" wheels did extremely well with the weight it hauled plus towing weight behind it. Now that I have DRW, the biggest change I feel is how the heavier stock spring pack handles the same weight verses my modified suspension.
SO SPEND SOME MONEY ON YOUR DUALLY AND MODIFY IT!!
Oh thats right, there is no need.:B
You missed the point completely. His point was the suspension system on the DRW is the primary reason why they "feel" more stable. Unless you're actually to the point of almost rolling your rig, the width isn't so important. A wider stance just means less force is needed at the tire(s) to prevent tilting. A strong single tire at a narrow stance can certainly resist tilting as well as a weaker one(s) at a wide stance but most would not like riding on that firm of a tire.
TakingThe5th wrote:
You don't really need scientific studies, just take a dually on a test drive and see how much better it takes the turns and curves. It becomes obvious.
Cummins12V98 wrote:
I don't need no stinking study to tell me what I know from EXPERIENCE!
BenK wrote:
Common sense is very UN-common...
stand with both feet touching and have someone push you sideways
Again with feet wide apart
Which one will have that person pushing you sideways easier?
But...this is a common sense topic, so tough to get common sense into the
discussion...
Huntindog wrote:Bedlam wrote:So now we are talking about modified trucks?
Maybe some us had really well performing SRW's that the delta between them and DRW is not that much. My F250 with modified suspension and 19.5" wheels did extremely well with the weight it hauled plus towing weight behind it. Now that I have DRW, the biggest change I feel is how the heavier stock spring pack handles the same weight verses my modified suspension.
SO SPEND SOME MONEY ON YOUR DUALLY AND MODIFY IT!!
Oh thats right, there is no need.:B
valhalla360 wrote:It's about standards.RinconVTR wrote:valhalla360 wrote: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.
Question was about stability...not load...not safety...stay on topic. You answered the question yourself...but yet you go on.
If you look at the trucks converting from dual to single tires, they are not carrying the highest loads and the single tire is VERY wide. VERY WIDE! Now why would they do that? Hmmmm
Also stability while towing...IMO...does not mean resistance to tip over. Roller over "stability" I don't believe was the point of discussion here, but if it was, I'd simply take measure. The wider version likely wins. And is that not the dually?
Safety was implicit in the question. If the OP wasn't concerned with safety, what would be the point of the question?
To end it as yes, it's stable and ignore the fact that there is no distinguishable benefits (other than load ratings), would be highly misleading, so I took the liberty of adding to the discussion.
Supersingle truck tires are very wide. They are very wide so they can handle heavy loads not to make the truck more stable. I brought it up because there were misleading posts that more than one tire is intrinsically more stable.
True, stability could be in reference to either roll overs or the trailer pushing the back of the truck around:
- For roll over, there is an improvement but as stated, there's not a problem with SRW trucks towing 5th wheels falling over. The impact while towing is negligible and well within safe operating parameters.
- For stability in reference to the trailer pushing the rear of the truck around, there is even less effect (not that 5th wheels typcially have an issue with this anyway). There may be a couple hundred pounds from the extra tires, axle length and such but overall the weight planted on the rear axle but it's going to be pretty close to the same for a similarly outfitted rig. Available traction is a function of the coefficent of friction and the force pressing the wheels to the ground. If they are the same, there would be no additional stability. Any negligible difference could be made up by throwing some extra weight in the truck bed.
So my initial answer still stands. There is a difference but not enough to matter.
Bedlam wrote:So now we are talking about modified trucks?
Maybe some us had really well performing SRW's that the delta between them and DRW is not that much. My F250 with modified suspension and 19.5" wheels did extremely well with the weight it hauled plus towing weight behind it. Now that I have DRW, the biggest change I feel is how the heavier stock spring pack handles the same weight verses my modified suspension.
valhalla360 wrote:NC Hauler wrote:
I've towed the same 5er over the same terrain with a 1 ton SRW truck and the dually...99% of my towing is on mountainous, curvy roads in NC, SC, TN, VA and WVa....Running at the same speeds, the dually, in my opinion, handled my 5er in a more stable manner on the curvy, mountainous sections of the roads..just seemed, (to me), to handle the load a little better....I have a high profile 5er loaded to 16,300#.
Driving on flatland, guess it might not matter, but in windy conditions, seems the towing experience seems to be a little more stable....Again, going by my own personal experience. And it should be obvious, as stated above that the "wide tracking" in the rear that the dually provides, will help with a more stable ride...I personally purchased my first dually in 05' because of weight of a 5er I was towing...not necessarily for anything else, BUT, after towing the same roads with the same unit and then hooking up to a dually, THEN, I became convinced that it offered a more stable towing experience...but again, I'd say it would depend on how heavy you're towing and WHERE you're towing. In my case, and my opinion, with my 5er, I prefer the dually for where I do most of my towing.
What you describe is more about stiffer suspension than extra wheels.
The Mad Norsky wrote:
There is a forum member who uses the user name Veebyes.
Driving through Wyoming somewhere near Laramie on I-80 pulling their fifth wheel with dually truck, they got hit with a huge side burst of wind.
The kingpin of the fifth wheel was torn out of the hitch in the box and the fifth wheel ended up rolling down an embankment, destroying itself in the process.
The fifth wheel dragged the truck some over towards the shoulder of the road before the kingpin tore loose, but the truck stayed upright.
Veebyes has stated he believes the dual's prevented the truck from following the fifth wheel on down the embankment and rolling too.
Anecdotal, yes, but had this operator had a single rear wheel vehicle, would the results have been the same??????
NC Hauler wrote:
I've towed the same 5er over the same terrain with a 1 ton SRW truck and the dually...99% of my towing is on mountainous, curvy roads in NC, SC, TN, VA and WVa....Running at the same speeds, the dually, in my opinion, handled my 5er in a more stable manner on the curvy, mountainous sections of the roads..just seemed, (to me), to handle the load a little better....I have a high profile 5er loaded to 16,300#.
Driving on flatland, guess it might not matter, but in windy conditions, seems the towing experience seems to be a little more stable....Again, going by my own personal experience. And it should be obvious, as stated above that the "wide tracking" in the rear that the dually provides, will help with a more stable ride...I personally purchased my first dually in 05' because of weight of a 5er I was towing...not necessarily for anything else, BUT, after towing the same roads with the same unit and then hooking up to a dually, THEN, I became convinced that it offered a more stable towing experience...but again, I'd say it would depend on how heavy you're towing and WHERE you're towing. In my case, and my opinion, with my 5er, I prefer the dually for where I do most of my towing.
