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mbloof
Beaverton, OR
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Grit dog wrote:3 tons wrote:Bedlam wrote:Since the frame pivots on the axle at same point of a DRW and SRW pickups, I think the stability comes more from sidewall stiffness and higher rated springs. Until you start picking up a rear wheel I do not feel the width plays a role.
Believe whatever you like…as I stated, not from pontification but from actual real back to back experience from having two identical trucks differing ONLY in SRW vs DRW, there IS an outrigger effect, but honestly I almost feel like I’m barking at the moon, so for those doubting Thomas’s enjoy your comfort providing paradigm and feel free to disregard… ![[emoticon]](http://www.rv.net/sharedcontent/cfb/images/smile.gif "smile")
3 tons
Think geometry for a moment.
With the same spring set and same load the DRW actually has MORE leverage against the spring set than the SRW does so the suspension will have more sway with a DRW then a SRW. (the pivot point is the center where the axle spring pack make contact and the leverage point is the outside of the tire)
However most will claim a DRW is "more stable" because twice as many sidewalls reduce the sidewall flex considerably. The reduction in sidewall flex is much greater than the additional suspension leverage resulting in reduced sway or "more stable" ride.
For SRW's switching to commercial rated tires with fairly to very stiff sidewalls is equally or more effective.
- Mark0.
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Lantley
Ellicott City, Maryland
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No dog in this fight but actual experience always supersedes text book theories
My dually is more stable than my SRW trucks.
Is it the out rigger effect or is it stiffer sidewalls? Does it matter? From the drivers seat I can feel a noticeable difference.
My dually also has more braking power, it certainly stops my trailer much faster the my SRW trucks. Again this is determined from the drivers seat not from the text book.
19'Duramax w/hips,12'Open Range,Titan Disc Brake
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greenno
Clairemont Cal.
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Gdog I have a hard time believing that I should be running 35psi in my rear tires.
I could probably drop the front a bit more but I'm thinking not 15psi.
I have pretty even wear across the tire tread so I know I'm close to having a flat surface on the road.
Side treads as well as the centers were about the same so it's not crowning.
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mbloof
Beaverton, OR
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Lantley wrote:No dog in this fight but actual experience always supersedes text book theories
My dually is more stable than my SRW trucks.
Is it the out rigger effect or is it stiffer sidewalls? Does it matter? From the drivers seat I can feel a noticeable difference.
My dually also has more braking power, it certainly stops my trailer much faster the my SRW trucks. Again this is determined from the drivers seat not from the text book.
Funny as if you look at the actual part numbers for the DRW and SRW breaks guess what?
They are the same.
So much for "seat of the pants" theories...
Enjoy your DRW, for whatever reasons you have.
- Mark0.
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srschang
Western NY
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Think geometry for a moment.
With the same spring set and same load the DRW actually has MORE leverage against the spring set than the SRW does so the suspension will have more sway with a DRW then a SRW. (the pivot point is the center where the axle spring pack make contact and the leverage point is the outside of the tire)
However most will claim a DRW is "more stable" because twice as many sidewalls reduce the sidewall flex considerably. The reduction in sidewall flex is much greater than the additional suspension leverage resulting in reduced sway or "more stable" ride.
For SRW's switching to commercial rated tires with fairly to very stiff sidewalls is equally or more effective.
- Mark0.
Not sure what truck we are talking about, but on the Ram, more leaves on the DRW than on the SRW. And I switched to 19.5s on my 2020 Ram SRW. My 2022 Ram dually with the factory tires has less side to side sway than the 2020 with commercial tires.
* This post was
edited 02/26/23 05:55am by srschang *
2022 Ram 3500 Dually Crewcab Longbed Cummins, 2019 Northstar 12 STC
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3 tons
NV.
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KKELLER14K said:
“ This is why I feel a tad bit safer having 4 rather than 2 under the rear load.”
Exactly, Nuff said…
3 tons
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SoonDockin
Oklahoma
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I feel more tires is better, also bigger is better. Its why I went from a F350 Single to a F450 Dually and now a 5500. F450 was super stable, 5500 takes it to a whole new level.
2022 Ram Laramie 5500 60" CA New pic soon
2018 Arctic Fox 1140 Dry Bath
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Lantley
Ellicott City, Maryland
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Lantley wrote:No dog in this fight but actual experience always supersedes text book theories
My dually is more stable than my SRW trucks.
Is it the out rigger effect or is it stiffer sidewalls? Does it matter? From the drivers seat I can feel a noticeable difference.
My dually also has more braking power, it certainly stops my trailer much faster the my SRW trucks. Again this is determined from the drivers seat not from the text book.
Yes but I have 2 extra tires transferring that braking force to the ground.
For the same reason I believe SRW trucks perform better in snow because they have less ground contact and dig/sink into the snow for better traction. DRW trucks have more ground contact and brake better. All my comments are from real encounters from the drivers seat not from trying to match part numbers or derived from what I think might happen.
Once you have experienced the performance first hand from the driver's seat, you no longer have to imagine what will happen.
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Grit dog
Black Diamond, WA
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KKELLER14K wrote:You nailed it...I'm not a basher but those are the Toyo HT. Just bad tires. Good call deserteagle56. You know the brand and type to avoid. We have been down that road on bad tires. I was already leary after two other gave outs and it was definitely time to change it up. They were at about 50% anyway so it was a no-brainer.
So now Toyo = bad? Lol. They’re literally one of the highest quality tires produced currently.
Were yours and the other guys tires not part of the recall on Toyo HTs?
Or were they and you guys were unaware or possibly it happened before the recall and your tires are part of the reason for the recall?
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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Grit dog
Black Diamond, WA
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greenno wrote:Gdog I have a hard time believing that I should be running 35psi in my rear tires.
I could probably drop the front a bit more but I'm thinking not 15psi.
I have pretty even wear across the tire tread so I know I'm close to having a flat surface on the road.
Side treads as well as the centers were about the same so it's not crowning.
Have you ever viewed a load vs pressure chart for your size tires? If you had, you would not have a hard time believing what I told you.
Min safe pressures for all conditions (not talking aired down for off road traction) for a truck your size (unloaded) with that size tire is actually 40F/25R. But that’s a little squishy. It’s a good pressure to run for the best traction on snowy roads.
When you have the camper on, different story due to weight on the rear axle and even though the front axle weight does not change appreciably (generally), bumping the front pressure up some from what is necessary helps with minimizing tire flex due to body roll with the camper.
Good to hear your tires aren’t wearing prematurely due to being over pressure when empty.
I’d surmise that most of your miles are loaded and not empty highway miles though. As that is enough pressure to balloon the tires a bit. Especially the rear.
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