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Old 10-31-2013, 05:02 PM   #11
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I'd wonder what the manufacturer has put on the weight label on the camper per axle...axle weight rating (I'm assuming 3500# axles) or max of 3480# (max tire load x 2). What does the sticker say?

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Old 10-31-2013, 05:06 PM   #12
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I quess I can answer my own question. The max load rating for 205/75/14 C is 1760 lbs, not 1740 lb. I didn't think any manufacturer would put OEM tires on that didn't exceed the camper's axle rating, though just barely.

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Old 10-31-2013, 07:08 PM   #13
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I'd wonder what the manufacturer has put on the weight label on the camper per axle...axle weight rating (I'm assuming 3500# axles) or max of 3480# (max tire load x 2). What does the sticker say?

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The sticker says 3500 lbs axles
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Old 10-31-2013, 07:11 PM   #14
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I wonder what would be better. Running the tires that are on it, didn't realize the tongue weight came off of the trailer weight. Makes a difference. Or get d load rated and run either 65 psi or figure the pressure I should have in then to carry that weight. I think running the d rated tires at 65 psi would make for a bouncy trailer
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Old 10-31-2013, 07:16 PM   #15
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Mine is the same, weighed it and has 6613 on the tires; Fixin to order a set of Kumhos 857 before I have trouble..
I have been running this tire for 2 years; they're AWESOME! It's a D rated 14" tire with a 99 mph speed rating. (Yep, look it up.) They run nice and cool.

My trailer came with 205/75/14 C-rated tires. I changed to Kumho 857s in size 195/82/14 D-rated. This size Kumho will give you exactly the same circumference as your original tire and still give you substantially more capacity. On my trailer, circumference/diameter was an issue as my axles are very close together; only 2" between the tires.
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Old 11-01-2013, 08:13 AM   #16
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You mean your tires are ST205/75R14 LR-C. With 14" tires there is not a lot of choice. You can go to ST205/75R14 LR-D and have extra tire capacity which means that when you run the tires at 65 they will be underloaded and with that safety margin you might get more than a couple years life.
Remember ST type tires are rated for 65 mph max. That is like an engine Redline on a tach. It's possible to exceed the max speed but you will be doing damage.
You might want to confirm the max load and max inflation limit on the wheels. Get something in writing on these limits.
thanks for the info tireman. what would you recommend in this situation. run whats on there? or upgrade to the d rated? would you run the d rated at max pressure?
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Old 11-08-2013, 12:33 PM   #17
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With multi axle trailer I would run the inflation molded on the tire. This will lower the internal shear forces that are trying to tear the belts off the carcass.
There are engineering design computer programs available today that were never dreamed of when the design standards for ST type tires were originally developed decades ago. I have never heard of any RV "assembler" having an engineering design department or staff charged with the goal of designing long term durability into the units they build, so they would not know of these tools.
I asked one of the advance design engineers at a major tire company to run a computer simulation of multi axle trailers and he confirmed that the major forces we see that "bend" tires and axles when you are turning tight radius turns in multi axle trailers are doing hidden internal damage to any tire in multi axle application.
The only way to lower these forces are to significantly lower the tire loading (by 20 to 30%). Since we can't do that then the only thing owners can do is to increase the inflation to the number molded on the tire sidewall.
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Old 11-08-2013, 12:53 PM   #18
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thanks for the info tireman. what would you recommend in this situation. run whats on there? or upgrade to the d rated? would you run the d rated at max pressure?
Upgrade to LR D tires and run max pressure stamped/molded on sidewall. You shouldn't notice much difference in bounce.
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Old 11-08-2013, 04:46 PM   #19
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thanks everyone. load range d 205/75/14 aren't a common tire and the dealer said they can't find them so the dealer is going to swap my tires for 215/75/14. which has 1870 lb load capacity. which makes me a lot more comfortable. so I should be good. even at gvw of the trailer the tires have 10% more capacity and realistic weight I will have about 20% more capacity.
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Old 11-08-2013, 04:58 PM   #20
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thanks everyone. load range d 205/75/14 aren't a common tire and the dealer said they can't find them so the dealer is going to swap my tires for 215/75/14. which has 1870 lb load capacity. which makes me a lot more comfortable. so I should be good. even at gvw of the trailer the tires have 10% more capacity and realistic weight I will have about 20% more capacity.

Kumho 875 or Hankook RA08 is only brand I could find that is a 'D' rated tire

Either of them is hard to find in this part of the country, had to order from Tirerack
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