Trailer tire weight rating - Ford Powerstroke Diesel Forum
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Old 07-14-2013, 02:15 PM
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Trailer tire weight rating

On my last trip towing my toyhauler back from the dunes I had a blow out. Long story short I had to by 2 new trailer tires. They were st205 75/r15, cause thats what they had and I needed to get home. I was going to replace the other side of the trailer with tires but wondering about the total weight. So I took the trailer down and to CAT scale and got the weigths with about 50 gals of water between gray, black, fresh water, and 4 quads. Now when I go I will have more stuff in the back of the truck like firewood, coolers, BBQ ect. My weights were with the Weight distributing hitch hooked up

Steer axel - 4220
Drive axel - 4380
Trailer axel - 6860
Gross -15460

My last trip to the dump my truck weighed 7800ish. So I wondering if those tires are going to need to be replace aswell? They're rated at 1820lb.
So whats everyone else running? Having a blow out sucks and would like to avoid it this year... Also does the weight distributing hitch look like its set up ok?
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Old 07-14-2013, 03:35 PM
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To know if your WD hitch is set up right, need weights of empty truck and loaded truck/trailer with NO WD hitch for comparison.

With empty truck weight, then you'll know how much the trailer weighs. Right now, it looks like 7660.
Also, what is the GVWR of the trailer and GAWR of each axle on the trailer?
There's a lot more info that needs to be known right now.
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Old 07-17-2013, 08:20 PM
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If you've got 205/75/15 tires, that means you've probably got 3500# axles under it, which means you're almost at the weight limit now, you need bigger axles and tires under it, dual 5200#s with 225/75R15, load range E.
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Old 07-17-2013, 08:57 PM
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If I understand you right the tires that blew out were on the same side of your RV.
Sounds like one side of your RV may be over loaded. I am with Star on getting bigger
axles and springs. Make sure that your wheels will take the 10 ply load range E tires.
Doug
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Old 07-20-2013, 01:48 PM
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Here's a little hint too, tire pressure is critical and keeping your speed around 65 mph...
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