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Old 08-31-2015, 01:23 PM   #11
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Tire Specs

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Originally Posted by Tireman9 View Post
Be sure you understand the MAX operating speed for Low Platform Trailer tires. Many say 62 mph. This is MAX not average speed. Think of it as you would engine red line .

Their documentation says 75mph:
http://www.continental-truck.com/www...ss_htl2_ep.pdf

Or am I misunderstanding it?
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Old 08-31-2015, 01:46 PM   #12
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Max speed

Nope in this case you appear to be OK for speed.

Too many folks don't really do the homework and forget that tires in RV application can have a different speed rating than in their "normal" application.
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Old 08-31-2015, 03:48 PM   #13
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Dang...you guys are heavy.

How long before someone puts tandoms on their trailer? It really seems like a viable option


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Old 08-31-2015, 04:04 PM   #14
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Quote:
Originally Posted by Tireman9 View Post
Nope in this case you appear to be OK for speed.

Too many folks don't really do the homework and forget that tires in RV application can have a different speed rating than in their "normal" application.
Thanks for clarifying. I thought I had looked into the speed rating, but - as you say, I wasn't sure if it was different in our case.

Not that it matters for me, I generally do no more than 62 or so.
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Old 08-31-2015, 05:17 PM   #15
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Originally Posted by Iwannacamp View Post
Dang...you guys are heavy.

How long before someone puts tandoms on their trailer? It really seems like a viable option


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Slight confusion of terms.

"Tandem" axles is when there are two axles and "Triple" would be three axle.

"Dual" is when there are two tires next to each other on the same end of an axle as seen on the rear of most Class-A and Class C motorhomes.

The trailer in this thread should have had triple axles to achieve more reasonable tire loading but that would have cost money.
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Old 08-31-2015, 09:30 PM   #16
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Overloaded Recreational Vehicle (RV).

"The FMVSS have requirements for the manufacturer to use proper tires and rims for the gross axle weight rating (GAWR) and the gross vehicle weight rating (GVWR). The manufacturer may determine the GVWR by adding cargo capacity (if any) to the curb weight of the vehicle as manufactured. The wise consumer, before purchase, will determine if the vehicle has sufficient cargo capacity to carry the weight of water, additional equipment (such as televisions, and microwave ovens), and luggage. The manufacturer’s certification label must show the GVWR. The GVWR must not be exceeded by overloading the vehicle. There is little the government can do to assist a consumer who has purchased a vehicle that has insufficient cargo capacity for its intended use."

That's a direct quote from a NHTSA Q&A link about RVs. It sort of fits what the OP is doing to his trailer.
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Old 08-31-2015, 09:48 PM   #17
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Doug, are you changing tires again?
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Old 08-31-2015, 11:22 PM   #18
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The FMVSS have requirements for the manufacturer to use proper tires and rims for the gross axle weight rating (GAWR) ...
Interestingly enough, my camper's tires came up short for the axle ratings from the factory: 7,000 lbs. axles but only 6,480 lbs. between the 2 tires. And, without thinking about it- I did the same thing when I put Maxxis tires on it 2 years ago. But, then again- some folks here have asked if my "problems" weren't self-inflicted. Maybe, maybe not- but I took a big step in increasing my tire capacity.

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Doug, are you changing tires again?
I did a couple of weeks back. I found that the Maxxis tires that I put in '13 were maxxed out and overloaded with our current "long trip" weights where we're a bit over the camper's GVWR. I might not be maxxed out on any tire if I was at the GVWR, but I'd still be at their absolute max.

So, I went nutty and opted for a whole new rim + tire. Jumped up to a 17.5" rim and commercial truck tire.
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Old 09-01-2015, 11:53 AM   #19
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Does your trailer's certification label depict the axles GAWR as 7000# or something less such as 6750#.

You have described a perfect example of why the GAWR needs to be around 6750#.

The ST235/80R16E tires are manufactured in three distinct load capacities, 3520#, 3500# & 3420# all @ 80 psi.

It is a violation of federal regulations (FMVSS) for your trailer manufacturer to install 7000# axles and not make a notation about the Original Equipment tires having to be able to support at the very least 7000# axles. The trailer manufacturer commonly reduces the axles 7000# capability to something that will allow all three of those ST tires to be fitted in accordance with the regulations. The Maxxis tires are one of the brands that provide 3420# of load capacity @ 80 psi.

If in fact you do have a certification label that depicts 7000# GAWR for each axle without the accompanying documentation for the OE tires you can force the trailer manufacturer into a recall situation.

INFO: There is another tire regulation that states - in part - that any tire of the same size and load range manufactured with different load capacities must be defaulted to the lowest manufactured load capacity when used on a higher rated axle without documentation to allow it's fitment.
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Old 09-02-2015, 12:40 AM   #20
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Here's the sticker:
https://flic.kr/p/e87CyK

I don't recall seeing anything about a lesser GAWR.
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