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Old 03-09-2016, 03:47 PM   #11
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When everyone realizes that the GVWR is a CALCULATED figure of the GAWR + Pin/tongue Weight (and not reverse engineered), the world will be a better place and this conversation won't come up every week. As for 6840lb of tire load vs 7000 axle rating, that's something to contend with.
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Old 03-09-2016, 06:26 PM   #12
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GD on FR site

It is very obvious no attempt was made to contact GD. GD is one manufacturer who will answer you statements ans questions directly by Email and phone. Go to their WEB Site to get the REAL FACTS. I gave up on FR and Jayco, both had standard answers - go to your dealer.
Yes, I am ordering a GD and contacted a service engineer directly about weights, furniture and structural questions. The engineer told me what changes I would see in my order, now I have a choice - what's on the lot or brand new. Try it you're be amazed or get everyone elses opinion.
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Old 03-09-2016, 07:24 PM   #13
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Axles are not built in increments that may be needed by a RV trailer manufacturer. Therefore, during the building process the trailer manufacturer has the authority from the DOT to set GAWR values to coincide with the specifications of the trailer to be built. Those GAWR values become the standard for that trailer and are displayed on the vehicle federal certification label.

The very minimum value for tire fitments is to have the ability to carry the vehicle’s GAWR. So, any of the ST235/80R16E tires would be disqualified for service on 7000# GAWR axles. However, the vehicle manufacturer can set those axles at a GAWR value of 6750# and satisfy the safety requirement requiring them to support the maximum weight that may be carried by the GAWR axles.

Owners looking at the trailer’s brochure or individual axle tag are looking in the wrong place. The only official axle load is the GAWRs listed on the certification label.

Here is a picture of a certification label of a trailer with 7000# axles reduced to 6750#.

http://www.irv2.com/photopost/showfull.php?photo=22027

NOTE: The ST235/80R16E is manufacture with three distinct load capacities, 3420#, 3500# & 3520#. Without wording in the vehicle owner’s manual or on the certification label about which load capacity tires to use they all revert to the lowest load capacity (3420#) making all of them unqualified for use on 7000# GAWR axles.

Another note: I have personally seen GAWR axles set at 5080# to accommodate ST tires with 2540# of load capacity.
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Old 03-09-2016, 07:36 PM   #14
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Not sure what a service engineer is.... Sales engineer? Sounds like all the comments on this post pretty much agree. This site is for everyone and everyone is free to ask questions and give their best answers and or, opinions. Are we always 100% correct certainly not; but probably about as often as any GD employee would be... they have an agenda so don't bet your life on their answers either. JMHO.
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Old 03-13-2016, 12:04 PM   #15
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The OP has hit upon just how close to the limit these axles are running.
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Old 03-13-2016, 12:17 PM   #16
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a couple of hundred lbs wont make any difference, I just load up and head out.
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Old 03-13-2016, 12:20 PM   #17
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Quote:
Originally Posted by Too Tall View Post
The OP has hit upon just how close to the limit these axles are running.

Meh. I've got 2 7k axles with a gross of 14 k and a 2 k pin.
Not that close.


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Old 03-13-2016, 12:30 PM   #18
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Engineering near a limit is not unique to the RV world.
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Old 03-13-2016, 02:20 PM   #19
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Brand New Trailer - Axles Too Light for GVWR

I would argue that they are under engineered. It does explain why there are so many failures. I think the folks that participate in this forum are more savvy than most but there are many that don't have a clue just how little the margins are and consequently how overloaded they are.
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Old 03-13-2016, 02:32 PM   #20
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2 6k axles
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