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Tractor Transporting Discussion Forum

empty trailer bounces at 35 mph

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d wil

06-01-2011 19:00:06
72.65.20.232



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What causes my trailer to bounce at around 35 mph? above and below that speed it rides smooth. Recently changed tire sizes, but don't recall if it did it before. Only does it empty. thanks Dave




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Banditfarmer

06-08-2011 05:11:50
174.103.156.49



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
My trailer did the same thing and drove me nuts. But I did find the problem, the front axle was bent and I replaced it. Now it tows smooth at all speeds. Older rubber is harder and will slide easer and new rubber is softer and will grip more so if axle is bent alittle new rubber will make it more pronounced and cause it to hop. Bandit



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scotc

06-11-2011 02:06:14
75.245.242.14



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 Re: empty trailer bounces at 35 mph in reply to Banditfarmer, 06-08-2011 05:11:50  
New tires on a trailer??
I never saw that til I went to work for the guy I now work for.
I'm starting to get used to not having to patch things together to get through the season. Dad would have had my hide if I had a service call for a hydraulic hose.



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d wil

06-11-2011 05:19:07
72.65.20.232



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 Re: empty trailer bounces at 35 mph in reply to scotc, 06-11-2011 02:06:14  
Wish I would have kept the old tires on, no bounce with them. just were getting low on tread



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scotc

07-02-2011 03:06:52
72.100.57.151



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-11-2011 05:19:07  
I think minimum tread depth for a trailer or drive tire is 2/32 or 3/32. I know though, it's nice to have more tread than that.



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d wil

06-06-2011 18:10:54
72.65.20.232



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Just raised the hitch point on the truck 2 inches, seemed to help a little bit, but maybe wishful thinking. Dave



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mkirsch

06-06-2011 06:55:40
64.80.110.75



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
When a company has the word "America" or "USA" in its name, you can pretty much guarantee that their specialty is in selling Chinese products.



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d wil

06-05-2011 18:57:54
72.65.20.232



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Thanks for all the replies, I bought the new tires on Ebay, only place I could find 14.5 tires. I went from 700-14.5 to 800-14.5 They are made in China, which I did not know until I received them. The company name was tires USA so I thought I was getting a quality tire. Live and learn. thanks again, Dave



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Charles Todd

06-08-2011 07:32:38
155.130.107.20



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-05-2011 18:57:54  
14.5" rim size sound like MH tires. Unless it is a HD tandem dual beaver tail. Then it would be about a 30,000 lb trailer, probably pintle hitch. Could be the heavy MH springs.

CT



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rustyfarmall

06-06-2011 07:15:00
216.248.71.224



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-05-2011 18:57:54  
Quoting Removed, click Modern View to see

Your second clue should have been "Ebay".



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john_Bud

06-04-2011 21:39:10
216.222.188.211



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Maybe the angle of the trailer has changed with the new tires? Do you have a different drop hitch you can use?



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soundguy

06-04-2011 19:10:06
108.118.175.27



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
could be anything from a knot, to a bent rim, to just being out of ballance.

soundguy



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thegooseisloose

06-10-2011 09:33:27
74.142.140.119



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 Re: empty trailer bounces at 35 mph in reply to soundguy, 06-04-2011 19:10:06  
good call. I was having the same issue and it was a combo of a balance issue as well as replacing tires.



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soundguy

06-10-2011 13:19:09
68.243.142.37



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 Re: empty trailer bounces at 35 mph in reply to thegooseisloose, 06-10-2011 09:33:27  
yep.. last 'rough ride' I had was a golfball size knot that let out right before I hit the interstate.. was on my horse trailer.... loaded!


soundguy



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scotc

06-03-2011 19:52:45
75.221.148.13



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Put a little load on it and have someone follow you, watching your tires. My friend was pulling his 560 one day and thought he felt a vibration, checked his tires when we stopped for gas. Followed him about a mile down the road and got him pulled over, a tire came apart that fast. It had no visible problems at the gas station, and when I got him stopped the tread was separating, and the cords were all broken. It's a wonder it didn't blow up when we threw it on the deck.

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Brian Jasper co. Ia

06-03-2011 17:14:32
67.142.130.13



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Balancing the tires made a big difference on my trailer.



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mkirsch

06-03-2011 11:26:57
64.80.110.74



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
You have an axle alignment issue, and/or at least one bent axle.

Two or more tires are traveling in slightly different directions. When they get a certain amount of side pressure on them, they lose traction and *POP*, the trailer jumps into the air like a tiddly-wink.



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crookedwrench

06-02-2011 10:56:20
72.151.56.210



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
You are not alone. I have a double axle trailer with house trailer axles. Brakes on all four wheels, new tires, two tire shops to try to balance.
Loaded no problem. Below 35 or above 40 no problem.It doesn"t take long for me to speed up or slow down! I have owned the trailer for some time. It was like that when it only had 2 wheel brakes and old dry-rotted tires. I carry 90lbs in each tire. Under inflation with a load is NOT good. If I were making an empty long trip on slow roads ,I might consider dropping pressure to 50#? Otherwise I just adjust speed accordingly.

f

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charles todd

06-02-2011 09:55:49
155.130.107.20



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Too much air pressure?

CT



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smallercrawler

06-02-2011 09:18:32
166.82.254.181



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Dave, FWIW, have similar size trailer and had same problem @ 45-50 mph, balanced them-no help, out of town tire guy diagnosed tread
was "snakey": uneven side to side on tires. Got home, replaced tires and solved problem. Good luck.



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bobs old iron

06-01-2011 21:08:54
75.171.156.125



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
roads cause any trailer to bounce because of tire ruts, cross traffic ruts. your trailer is following the road at slow speeds, faster you go they start to hop over ruts because no weight to hold trailer down, ever with some load it still could bounce, you don't see/feel it as much. my 5x14 single axle does the same. i try not to look in mirrors at it.



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edj856

06-01-2011 19:17:28
174.57.65.82



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 Re: empty trailer bounces at 35 mph in reply to d wil, 06-01-2011 19:00:06  
Is it a single axle or tandem axle? If a single axle, the axle could be bent. A tandem, could be either a bent axle, or the two axles are out of alignment.



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d wil

06-02-2011 04:59:58
72.65.20.232



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 Re: empty trailer bounces at 35 mph in reply to edj856, 06-01-2011 19:17:28  
Double axle, empty weight 2000lb gross 12000 lb



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