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Speeds with a trailer

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Eldon (WA)
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PostPosted: Mon Jan 22, 2018 8:30 pm    Post subject: Speeds with a trailer Reply to specific post Reply with quote

I have been following a local hotshot on his utube channel lately. He runs Big Tex 14k trailers and tells his drivers to try to stay under 70mph since they are greased bearings. I never thought about it before, last trip I ran 75mph most of the way since the Duramax runs so smooth at that speed. Seems all the truck bearings are greased and I have never heard that speed wore them out faster. Thoughts?
 
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SVcummins
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PostPosted: Mon Jan 22, 2018 11:31 pm    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

I run 75 or 80 out on the freeway all the time my
speed sensor In the rear axle was making the
speedometer read off last time and I was running 85
and didn?t know it until I noticed the fuel mileage for
the trip was 10 mpg instead of 12.5 / 13 . I?ve never
had a wheel bearing issue
 
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D beatty
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PostPosted: Tue Jan 23, 2018 12:34 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

You can't find anything that says anything like that. The only thing they say is that you get better fuel mileage with bearings run in oil
less drag than greased bearing..
 
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JoeM(GA)
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PostPosted: Tue Jan 23, 2018 3:57 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

I would think the speed rating of the trailer tire would be a bigger issue if hub maintenance has been kept up.
My trailer is a grease hub, I know I?m paranoid, but I keep a cheap laser thermometer in the truck and shoot the hubs every
Time I stop. I just do it as I do my quick walk around strap/chain check.
 
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westga
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PostPosted: Tue Jan 23, 2018 11:53 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

JoeM have you every found a hub hot? Not disagreeing but just wondering.

I pulled an All crop 66 one time and kept a check on the hubs. It had brass bushing. They got fairly warm but ok.
 
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JoeM(GA)
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PostPosted: Tue Jan 23, 2018 12:59 pm    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

not on mine, I'm pretty religious on maintenance on mine, but I have on a friends that was heading to the same show I was.
Not foolproof by any means, but will show bearings with issues or dragging brakes with just a quick walk around. There's not a set temp, you're just hunting one a lot higher than the others.
 
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john in la
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PostPosted: Tue Jan 23, 2018 6:55 pm    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

Like already said I would be worried about the tires more than the hubs.

But really what difference does it make when the speed limit in Wa state is 60.



 
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Eldon (WA)
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PostPosted: Tue Jan 23, 2018 8:47 pm    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

CVPost-John in La wrote:
(quoted from post at 19:55:23 01/23/1Cool Like already said I would be worried about the tires more than the hubs.

But really what difference does it make when the speed limit in Wa state is 60.


<img src="http://photos.yesterdaystractors.com/gallery/uptest/a254699.jpg">


Most of my trip was thru Montana and South Dakota, I am a mile inside WA.....besides, I believe those speeds are for semis.
 
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showcrop
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PostPosted: Wed Jan 24, 2018 5:17 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote


I am too old to have to rush anymore.
 
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westga
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PostPosted: Wed Jan 24, 2018 8:22 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

Never consider it for trailer hubs or brakes.
Good idea.
 
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BarnyardEngineering
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PostPosted: Wed Jan 24, 2018 11:46 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

ST rated trailer tires are often speed-rated, so if you use those that would be your limiting factor. Mine are speed-rated at 65MPH at rated load, for example.
 
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kcm.MN
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PostPosted: Wed Jan 24, 2018 9:29 pm    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

I "might" hit 70 when pulling on the interstate in light traffic, but I much prefer to keep my speed at 65 or below. Much of that depends on what other traffic is doing. If I fear a sudden stop, I'll go a bit slower. Have been known to slow down to 55 just to let more radical drivers get a bigger lead ahead.

And, when loaded, I always feel each hub by hand at each stop!
 
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john in la
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PostPosted: Thu Jan 25, 2018 3:49 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

Idaho, Montana, and South Dakota are all 65.
In fact I do not know one state that is over 65.

But I really did not expect you to know that considering some Washington State Troopers do not.







 
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Eldon (WA)
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PostPosted: Thu Jan 25, 2018 6:59 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote


Obviously no one knows it then. The left lane thing is posted all over by signs, as far as the speed limits, the signs only say '75 MPH' and under that will be a sign that says 'Trrucks 65'....no mention of trailers on those signs. I have had guys pass me many times towing trailers doing 80 in MT and SD.I rarely drove over 67 with my Dodge as that was the 'sweet spot'. The Duramax seems to be a little higher. Thanks for all your digging, but it still does not answer the question of whether there is a speed limit for grease type bearings on a trailer....
 
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D beatty
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PostPosted: Thu Jan 25, 2018 8:10 am    Post subject: Re: Speeds with a trailer Reply to specific post Reply with quote

I wouldn't worry about bearings as much as I would tires. Most !4,000lb. trailer tires are rated at 65 MPH MAX with two brands rated 80 MPH.
 
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