Bouncing Camper? What? - Fiberglass RV


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Old 08-22-2016, 08:57 PM   #1
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Bouncing Camper? What?

I had new tires put on my camper today and it bounced so much that is scared me and my son. You could hear it in the van with the windows shut. My camper weighs about 1,000 pounds. I called the tire place and they took out some air which helped a whole bunch. The tires are not fully filled to what is suggested but it works better like that. What are your thoughts? Suggestions? Please share your knowledge!
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Old 08-22-2016, 09:20 PM   #2
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are the wheels balanced? Not normally an issue for trailers but could be an issue. Also the pneumatic tires are part of the suspension. With the tires inflated at a high pressure there would not be much flex in the tire. With a lower pressure the bumps will be absorbed by the tires.
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Old 08-22-2016, 09:28 PM   #3
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I've never heard of a Toet trailer, so I don't know what kind of suspension it has or how old it might be. But I'm wondering about the axle. I know a worn out rubber torsion axle will do exactly what you're describing. The rubber hardens and the axle no longer has any flex to it, so the tires act as springs and shocks.

If that is the case, the only solution is a new axle.
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Old 08-22-2016, 09:35 PM   #4
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It is a 2006. The bumping really concerned me. It didn't do it on the way to the tire place. It only happened after they put on the new tires. I want to prevent any problems in the future. Thanks!
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Old 08-22-2016, 09:37 PM   #5
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Supposedly they balanced the tires when we were there.
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Old 08-22-2016, 09:38 PM   #6
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I would ask what load range tire they put on the trailer. You need to know the weight of the trailer ( loaded ) and select the appropriate tire for the weight so you can inflate it for the load and the tire.
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Old 08-22-2016, 09:46 PM   #7
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Not the axle, then. Wondering if there is some defect in the tire itself. My utility trailer bounced badly right after I purchased it new. I could see in the rear view mirror it was on one side. They just gave me a whole new tire and wheel. Problem solved.

Interesting trailer. I've never seen one like that before.
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Old 08-22-2016, 11:45 PM   #8
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One other thing to possibly consider is it is really designed as an enclosed cargo trailer meant to have the weight of a motorcycle in it. Your build out is a lot lighter than a bike . I think other posts of the tire load rating you have now may come into play also, they may be to high. My utility trailers seem to off the ground half the time when empty but that's the nature of them.
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Old 08-23-2016, 06:12 AM   #9
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Another possibility is the wheel(s) could have been improperly installed on the trailer. Here's a link to what follows.
http://tires.about.com/od/understand...ric-wheels.htm

Unlike cars and trucks that use "Hub centric" wheels, Most trailers use "LUG CENTRIC" wheels. That's where the nuts holding the wheels on are tapered and center in the corresponding holes in the wheels. That in turn centers the wheel on the hub. It's possible when tightening down the first nut put on that the nut did not center in the hole. Therefore the rest of the nuts would not center properly also.

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Old 08-24-2016, 04:23 AM   #10
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Is the bouncing affecting both sides or one side? It it in reaction to a bump in the road (e.g. railroad xing, expansion strip) or is it occurring on smooth roads once you reach a certain speed?

If it's reactive, then it may be that the tire sidewall stiffness is just different from your old tire. As Glen B noted, the load range (b, c, d) may be higher/stiffer than your original tire. The fact that letting air out of the tires helped seems to confirm this. Adding weight to the trailer would change the "resonant frequency" of the suspension, as would tires that are less stiff.

You may find that once the trailer has a full camping load that it won't be an issue.

Otoh, if it's vibrating or bouncing in response to nothing, then something is out of whack - balancing, bad tire, etc.
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Old 08-24-2016, 05:12 AM   #11
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What kind of tires? LT, ST or passenger?
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Old 08-24-2016, 01:08 PM   #12
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Check also for tires "out of round "
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Old 08-24-2016, 02:35 PM   #13
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Quote:
Originally Posted by Borrego Dave View Post
One other thing to possibly consider is it is really designed as an enclosed cargo trailer meant to have the weight of a motorcycle in it. Your build out is a lot lighter than a bike . I think other posts of the tire load rating you have now may come into play also, they may be to high. My utility trailers seem to off the ground half the time when empty but that's the nature of them.


Yes, "Shelly," our little motorcycle cargo trailer, bounces like a rabbit when towed empty. When loaded, it just glides along. (Towed behind our dodge van.)
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Old 08-24-2016, 04:39 PM   #14
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Quote:
Originally Posted by Toet101 View Post
I had new tires put on my camper today and it bounced so much that is scared me and my son. You could hear it in the van with the windows shut. My camper weighs about 1,000 pounds. I called the tire place and they took out some air which helped a whole bunch. The tires are not fully filled to what is suggested but it works better like that. What are your thoughts? Suggestions? Please share your knowledge!
1. You hopefully had trailer tires put on.

2. As Joe mentions in post #9, balancing is different for trailer tires. Many places with tires do not have the equipment (which is different from that used for cars) to balance trailer tires nor do they even know that trailer tires are balanced differently, much less how. (Then there are the places that think that trailer tires need no balancing.)

Try to determine if the place actually knows what they are to do differently for a trailer tire and whether they have such equipment.
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