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Old 11-12-2010, 08:04 PM   #15
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I personally prefer the square bars, because if they take a set, you can invert them. That cannot be done with the round bars.

Andy
Late model square bars cannot be inverted because the cam is built into the bar.
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Old 11-12-2010, 11:00 PM   #16
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To determine the proper size of the Reese weight distribution bars look on page 28 of the Reese Heavy Duty Towing & Trailering Accessories catalog:
http://www.reeseprod.com/content/dow...ng_Catalog.pdf
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Old 11-13-2010, 08:28 AM   #17
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Any spring steel, can and often does, take a set.

Square, round, triangular, oval or rectangular, all the same.

Andy
Trunion (square) bars are not very flexible, and therefore are more prone to take a "set".

Round bars are more tapered, more flexible, and therefore are very much less prone to take a "set".

Then, if you put 1000 pounds of load on 500 pound trunion bars, they will DEFINATELY take a "set".
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Old 11-13-2010, 09:28 AM   #18
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Bar flexing

Testing Reese round and square bars, show no difference in the amount of bend, for a given load.

That may be different for other manufacturers.

Bars when overloaded, can take on a set. As an example, instead of the trailer and tow vehicle being level with each other, they form more of a "V" shape, such as boarding a ferry boat.

Facts are facts.

Andy
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Old 11-13-2010, 11:44 AM   #19
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Hitch bar ratings are dictated not only by the tongue weight, but also by the type of tow vehicle.

What exact tow vehicle will you be using?

Andy
Where do we find the formula or chart that tell us how much to adjust the hitch manufacturer's ratings based on what tow vehicle we use?

Ken
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Old 11-13-2010, 11:53 AM   #20
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Testing Reese round and square bars, show no difference in the amount of bend, for a given load.

Andy
Andy,

If you really had the "experience" you claim, and I mean experience using all types of these hitches and not just selling them, you would know your statement above is not true.
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Old 11-13-2010, 11:56 AM   #21
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Ya'll are assuming that the alloys are the same in all bars too. I am told by Equal-I-Zer that they are not.
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Old 11-13-2010, 01:16 PM   #22
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Where do we find the formula or chart that tell us how much to adjust the hitch manufacturer's ratings based on what tow vehicle we use?

Ken
Experience.

Andy
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Old 11-13-2010, 01:23 PM   #23
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Andy,

If you really had the "experience" you claim, and I mean experience using all types of these hitches and not just selling them, you would know your statement above is not true.
My experience is vouched for all over the world, by international and national news media's.

What is your "experience"? Where can one find a publication naming you as an expert?

I know my experience and Airstream knowledge is subminiture.......to some.

Andy
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Old 11-13-2010, 02:55 PM   #24
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Experience.

Andy
And how many MODERN tow vehicle/hitch/trailer combinations have you tested in your vast experience that apparently makes you more knowledgeable that the engineers that design these products and set the safe weight limits?

I'm thinking this is the kind of expert we need right now.
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Old 11-13-2010, 03:13 PM   #25
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My experience is vouched for all over the world, by international and national news media's.

What is your "experience"? Where can one find a publication naming you as an expert?

I know my experience and Airstream knowledge is subminiture.......to some.

Andy
Well, if you would like, I'd more than happy to compare actual hitch in use towing experience with you. I'm talking about actual use of these products, not some insurance accident investigation thing from twenty years ago that does not even include the hitch products on the market today.

How many thousands of miles have you towed your Airstream in the last year, what type hitch did you use, what tow vehicle, how many states did you tow in, on what type roads, do you even own an Airstream?
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Old 11-13-2010, 04:42 PM   #26
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Trunnion Bar or Round Bar? according to etrailer expert.

Which Weight Distribution Style is Better, Trunnion Bar or Round Bar | etrailer.com

Expert Reply:
You will hear arguments for both, the general consensus around etrailer.com is that trunnion systems are the better design. The bars are very easy to remove and install in the head. Since there is no bend in them, they are considered stronger and more durable. Since the head does not come down and the bars do not stick out of the bottom, there are less ground clearance issues. Some people argue that round bar systems are easier to adjust, but you set the brackets and head once and as long as you are towing the same trailer, you usually do not have to adjust them again.

toastie
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Old 11-13-2010, 06:14 PM   #27
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Trunnion Bar or Round Bar? according to etrailer expert.

Which Weight Distribution Style is Better, Trunnion Bar or Round Bar | etrailer.com

Expert Reply:
You will hear arguments for both, the general consensus around etrailer.com is that trunnion systems are the better design. The bars are very easy to remove and install in the head. Since there is no bend in them, they are considered stronger and more durable. Since the head does not come down and the bars do not stick out of the bottom, there are less ground clearance issues. Some people argue that round bar systems are easier to adjust, but you set the brackets and head once and as long as you are towing the same trailer, you usually do not have to adjust them again.

toastie
"Since there is no bend in them" = Stiffer than round bars and so rougher riding, as I has stated before.
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Old 11-13-2010, 06:51 PM   #28
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I think that they are talking about the 90 degree bend in the round bars. Because there is a bend in the round bars, the author claims that this could a weak point in the design.
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