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 > Road with uneven surfaces.......

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covered wagon

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Posted: 11/08/20 08:05am Link  |  Quote  |  Print  |  Notify Moderator

My SRW Ram 2500 just got new M&S E rated Michelins. Wow, How they wandered until they got broken in. As long as the road is graded even with a newer surface its a butter cake to steer, but when you get to old surfaces that tilt side to side you really have to compensate the wheel. I suppose you could call it tilt steer. I hate it the first couple hours on a new trip. After that I'm sort of automated about handling it and becomes a simple difference between loaded and unloaded.

Any you guys with Duals experience some degree of a top heavy feel while on older surfaces?

BTW, my camper weights around 3,000-3400 depending on the trip.

fpoole

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Posted: 11/08/20 08:20am Link  |  Quote  |  Print  |  Notify Moderator

Well, not sure if this is what you're talking about, but I have RAM 5500 dually and got new tires and the first 200-300 miles or less, can't really remember it felt like the front end was floating...
Went back, they let a little air out of the front ones and it did better.. Now don't notice at all and ride/steers like normal. All this with camper on.
Don't know if I just got used to it or they corrected and started to wear the 'New-ness' down but good right now...
Hope that helps..


Frank Poole
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Kayteg1

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Posted: 11/08/20 09:00am Link  |  Quote  |  Print  |  Notify Moderator

My F350 dually handles rock-solid with 6000 lb camper, but ordering for purpose of camper handling, I ordered RWD, so it is 3" lower than 4WD.
Before I had F250 and that handled lighter camper rock-solid as well.
What tire pressure do you use?





opnspaces

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Posted: 11/08/20 09:15am Link  |  Quote  |  Print  |  Notify Moderator

Not the same but I think the cause is the same for all of us. A few months ago I put new tires on my Suburban and it wandered all over the place and was downright scary to drive down the highway.

What I finally figured out is that tires all grip the road and handle differently. (Well I knew that part) Once you get used to how your tires handle you just instinctively or subconsciously move the steering wheel back and forth tiny bits as needed to keep straight in the lane. When you change lanes or take a corner you know how far to turn the wheel.

When you put new tires on you hit the road and your muscle memory tries to use the same little subconscious moves of the steering wheel and those slight moves are all wrong for your new tires. Couple that with the new tires not yet being broken in and you can get a downright scary ride for the first hundred miles or so.


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specta

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Posted: 11/08/20 09:17am Link  |  Quote  |  Print  |  Notify Moderator

The worst tires that I've had when it came to following ruts or any other pavement irregularities were Yokohama Geolander ATs.

My current Michelin Agilis CrossClimate tires are hands down the best tires I've had on my truck so far and they are set number six.


Kenny
2011 Chevy 2500 HD 6.0L 4wd
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Old-Biscuit

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Posted: 11/08/20 09:53am Link  |  Quote  |  Print  |  Notify Moderator

Road Chamber will affect tire loads on duals...that will cause tracking issues on uneven/tilted surfaces

[image]

Not as pronounced on SWR but suspension is under differing torque/loading so tacking is affected


Is it time for your medication or mine?


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covered wagon

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Posted: 11/08/20 03:56pm Link  |  Quote  |  Print  |  Notify Moderator

Thank you Old Biscuit, that's what I'm talking about. I call it 'tilt steer'.

When my tires were new I kept increasing the pressure in the front tires that's my mistake and took two 1400 mile trips before things settled down.

Perhaps another contributing cause is my Air Bags, which have separated air fills, are holding the suspension too high off the overload springs. In fact the overloads never touch the bump stops at all.

I need to figure something there to help with this.

Thank you all for the help too it's great.

bighatnohorse

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Posted: 11/08/20 07:30pm Link  |  Quote  |  Print  |  Notify Moderator

Those tires can be inflated anywhere from about 65 psi to 80 psi.
What psi do they have now? Have you experimented with changing tire pressure yet?


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covered wagon

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Posted: 11/08/20 08:01pm Link  |  Quote  |  Print  |  Notify Moderator

bighatnohorse wrote:

Those tires can be inflated anywhere from about 65 psi to 80 psi.
What psi do they have now? Have you experimented with changing tire pressure yet?


I've got the rears at 80 psi and the fronts at 70. It steers well, very straight when the surface is flat and not tilted.

Are there any good solutions to getting the overload springs back in action? Since putting on the airbags the rear is so well supported, but is not allowing use of the overload springs.

I am aware of using bump stops or supersprings on the overloads..... just wondering if anyone has a recommendation for either since one or the other might be a better option based on someone's experience.

kohldad

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Posted: 11/08/20 10:14pm Link  |  Quote  |  Print  |  Notify Moderator

Use something like Torklift Stable Loads lowers to have the overload springs engage sooner and then also let some of the air out of the bags. You need the truck to settle a little when you put the camper on to have enough pressure on the spring packs. Over inflating the air bags is a common mistake.


2015 Ram 3500 4x4 Crew Cab SRW 6.4 Hemi LB 3.73 (12.4 hand calc avg mpg after 92,000 miles with camper)
2004 Lance 815 (prev: 2004 FW 35'; 1994 TT 30'; Tents)


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