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Old 10-11-2016, 11:49 AM   #43
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Originally Posted by dayle1 View Post
Most common LT tire on 3/4 ton trucks has a load capacity of 3042 lbs. My 1 ton has tires rated at 3525 lbs and a rear GAWR of 7050 lbs.

So trailers or trucks, if GAWR is very close to the OEM supplied tire capacity then it is the tires that set the GAWR limit. If tire capacity is higher than the GAWR then something else is the limiter and the excess tire capacity is unusable.
Is yours a Ford 350 SRW?

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Old 10-11-2016, 11:00 PM   #44
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All the LT tire naysayers can keep their ST tires. All I know is that this is the first year that I haven't had a trailer tire blow on me and this is the first year that I switched to LT tires. I'm using Korean Nexen LT tires and they have been awesome in over 7k miles of towing at speeds higher than 65mph.

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Old 10-12-2016, 04:32 AM   #45
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St tires are only rated to 55 mph. Above that, even at max rated pressure they start to get hot and eventually fail. Run at 70-75 with a near full load and it's going to happen.

A good friend of mine is a retired Firestone engineer and multiple-time road-racing champion. He told me that on STs if running fast or in hot conditions go 10% over max sidewall pressure. It will stiffen the tire and prevent sidewall flex and heat build-up. and allow you to tow up to 65 with more peace of mind.

If you are worried about"overpressure" the tires are designed to 300% sidewall pressure, so all +10% will do is get them to "beach ball" a little and wear faster down the middle.

He runs LTs though, and he said there are only two sidewall issues to consider - the trailer may pick up a bit more sway, and the sidewalls are not as tough as the ones on trailer tires, which the manufacturers expect to get dragged over curbs and such.

As long as you pay attention to the inside tires on turns and keep them aired up to max the LTs are a better choice if you tow fast or in hot locations.
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Old 10-12-2016, 05:45 AM   #46
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Originally Posted by VanDiemen23 View Post
St tires are only rated to 55 mph.
The ST tires on my trailer are rated for 75 MPH max. Every operator has to know their particular equipment limits and condition.
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Old 10-12-2016, 06:47 AM   #47
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Thanks all for the discussion!

LT's are being installed tomorrow am. Before the trip home. I think this is a good call in this specific case. They will be under loaded and run at max pressure. Again,,,, the ST tire solution is not working, and I really believe it is a wide spread problem that needs to be addressed in the industry....

#1 the tires are not up to the job.
#2 the RV's are not constructed to survive a tire failure without significant damage.

I now run a Class A, however for years prior I experienced this myself, tried multiple brands on a tri axle trailer, and had 6 tire failures in probably 40,000 miles. Maxiss, and other brands were tried, I never had tires on the trailer owned from 2004 to 2015 older than 2 1/2 years as each time one failed,,,, I replaced them all due to fear of more significant damage. I ran a tpms, was religious about checking pressure, and never had a clue till the big bang,,,,, except for when my son saw the tell tale wobble from behind. I did not have another option on my tri axle as it ran 15" tires.

Lots of discussion here about sidewall. My failures and my son-inlaws in this thread were belts in the tread failing. If you examine his failing tire at this moment on his trailer,,,, the tread has a wave in it... it will soon come apart.

Thanks all!!!
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Old 10-12-2016, 07:20 AM   #48
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Originally Posted by Lloyd in S.C. View Post

Lots of discussion here about sidewall. My failures and my son-inlaws in this thread were belts in the tread failing. If you examine his failing tire at this moment on his trailer,,,, the tread has a wave in it... it will soon come apart.

Thanks all!!!
Good point, when my Maxxis tires started failing, it was along the shoulder at the transition from stiff sidewall to tread belt. My TPMS warned of air loss on one tire, inspection showed rubber failure at the bottom of the tread grooves as they wrapped onto the sidewall. The other tires didn't leak but had same symptom. This may be the Achillies heel for ST tires and unbalanced wheels might add to the problem (although mine had been balanced).
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Old 10-12-2016, 07:39 AM   #49
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So I guy cant go wrong upgrading to 17.5" wheels and the Sailun S637 tires?

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