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Old 09-04-2013, 09:56 PM   #91
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Originally Posted by ependydad View Post
That's a fair reasoning.

But, I still think that you contradict a bit of what you say that there are design tolerances built into things. While ST tires can and do fail more often, what's to say that it was speed that caused it? Wouldn't a more likely culprit be road hazards?
Probably both, heat is a major contributor and heat is more often than not caused by under inflation. Road hazards may cause a few, but curbing is a more likely cause. The road hazards like chuck holes, etc are also encountered by the tow vehicle and you don't see tv tires disintegrating like trailer tires.

As for tire tolerances, I have no experience with the design or testing, only with mechanical design tolerances/testing. Most mechanical designers try for a minimum of 4-1 safety factor, or at least where I worked we did.
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Old 09-04-2013, 10:45 PM   #92
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Probably both, heat is a major contributor and heat is more often than not caused by under inflation. Road hazards may cause a few, but curbing is a more likely cause. The road hazards like chuck holes, etc are also encountered by the tow vehicle and you don't see tv tires disintegrating like trailer tires.

As for tire tolerances, I have no experience with the design or testing, only with mechanical design tolerances/testing. Most mechanical designers try for a minimum of 4-1 safety factor, or at least where I worked we did.
The maximum speed is 65mph, any faster causes the tire to begin to breakdown. The average tire life is 5000 to 12000 miles, 3 to 4 years. Most tire failures are do to age, which is not that old, and under inflation which causes excess heat. Most trailer s sit outside and if the tires are in the sun when you check them before a trip odds have it you are not putting enough air in. The tires need to be truly cold when filling.
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Old 09-04-2013, 11:23 PM   #93
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There are combos out there that are under all ratings. Mine for example. My truck has a payload of just under 2200lbs. It is also custom ordered and built for towing. Not many will have that build type though. Yes my combo has been scaled under complete loaded conditions with my family and my usual gear.

With careful planning and having the right gear so called '1/2 tonne' are more than capable of fifth wheel towing.
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Old 09-06-2013, 02:35 PM   #94
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Well! Yesterday I hooked my brothers 8526RKWS Flagstaff 29.3 feet and 1495 pin weight with my Nissan Titan. His pin weight was actually higher with load. The truck only dropped 2.25 inches. I pulled it 26 KM thru the back roads at 80 KPH.
The truck pulled it extremely well (Trl weight 7500Lbs). I noticed a slight left to right motion due to the tires P265 70/R18, and no bottom out but you could notice the weight. The brakes performed well, but this is not a pin weight that I would purchase a Trl with. I later scaled my Titan with my wife and I at 5900 lbs with fuel topped up with Reese hitch with slider on 6.5" box. My truck specs are 9500 tow, 1827 pin. I will be installing Timbren rear suspension next week. Hope this info also helps others determine their capabilities. Now to research what I am willing to tow. The dealer and RV sales seem to say your truck can haul way heavier, but after 29 years and climbing of driving a simi. I know what is to be overloaded and going down a mountain with breaks not being able to to slow you down. So for all of you who think you can. Please think twice. I would sure hate, to not have one day met, some of you in a campground having a beer, because you thought you could.
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Old 09-06-2013, 02:38 PM   #95
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The truck pulled it extremely well (Trl weight 7500Lbs). I noticed a slight left to right motion due to the tires P265 70/R18, and no bottom out but you could notice the weight. The brakes performed well, but this is not a pin weight that I would purchase a Trl with. I later scaled my Titan with my wife and I at 5900 lbs with fuel topped up with Reese hitch with slider on 6.5" box. My truck specs are 9500 tow, 1827 pin.
Out of curiosity, what is your GVWR?
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Old 09-06-2013, 02:48 PM   #96
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GVWR is 7100
Front 3800
Rear 4200
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Old 09-06-2013, 03:01 PM   #97
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GVWR is 7100
Front 3800
Rear 4200
Thanks. Looks like your advertised cargo carrying capacity may be 1,827 based on this:

>> My truck specs are 9500 tow, 1827 pin.

But, in reality if you're going to stick within your specs, you really only have 1,200 pounds (7,100 gvwr minus truck weight 5,900).

But, as you found- you were able to tow a bit more than that with your brother's camper (which, 1,495 looks to be the "dry" weight). The real pin weight is typically a fair amount more than that. Has he ever scaled it?
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