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Old 08-14-2014, 04:49 PM   #1
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TIRES

I know, the tire thread has been beaten to death. Something I noticed at our storage lot. There is a 2014 Wildwood TT with a GVWR of a little more than 7000#, it has 225/75/15D rated tires on it. Our 8289WS 5th wheel with a GVWR of 9300# came with C rated tires. Hmmm, thought maybe the person that owns the Wildwood changed out his tires but as it turns out after finely speaking with him he said that is the way it came. Looked around at other FR TT and found the "D" rated tires on those also. On our last camping trip, a 2013 FR TT with stock "D" rated tires. Why would FR put a lesser rated tire on a heavier RV? Enquiring minds would like to know.
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Old 08-14-2014, 08:24 PM   #2
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To increase profit margin?
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Old 08-14-2014, 08:38 PM   #3
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To make an additional 10 bucks. I looked hard at TT particularly the rockwood and vlites. One of the wholesale places had about 10% of the inventory with the spares on. I plan on replacing mine and upgrading to LTs in short order.

IMO trailer tires are junk including the marathons.

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Old 08-15-2014, 04:02 PM   #4
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What size tires do you have? I don’t think any of the ST tire manufacturers build the ST225/75R15 with a load range C. If so and your fiver has 4200# axles FR correctly fitted it with the LRC tires in that size.

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Old 08-15-2014, 04:10 PM   #5
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... I donít think any of the ST tire manufacturers build the ST225/75R15 with a load range C. If so and your fiver has 4200# axles FR correctly fitted it with the LRC tires in that size. Airdale
Don't understand your statement at all. If they don't make it, how can they be installed?
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Old 08-15-2014, 04:53 PM   #6
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I know, the tire thread has been beaten to death. Something I noticed at our storage lot. There is a 2014 Wildwood TT with a GVWR of a little more than 7000#, it has 225/75/15D rated tires on it. Our 8289WS 5th wheel with a GVWR of 9300# came with C rated tires. Hmmm, thought maybe the person that owns the Wildwood changed out his tires but as it turns out after finely speaking with him he said that is the way it came. Looked around at other FR TT and found the "D" rated tires on those also. On our last camping trip, a 2013 FR TT with stock "D" rated tires. Why would FR put a lesser rated tire on a heavier RV? Enquiring minds would like to know.
I have the same unit, mine came with 4000 lb axcels AL-KO and trail express "c" rated 50lbs. CP.225/75/15 Put 6000 miles on them before I had a blow out, then changed to Marathon "D" rated. You are legal, but at the max. within 250lbs I bet ya!. I have had Marathons on every trailer I have owned and been very happy with them. they are on my unit right now but still ST'S. You can put new GY "c" rated for your load but you might as well move up to "D" rated. Check the GY tire rating and the lbs. that you need to inflate them. to carry your load. To be honest their is no rime or reason, but that is what is put on the 8289WS supplied by lionhead..... You really do not need more then "C" rated you just want more ply.
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Old 08-15-2014, 07:32 PM   #7
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I have the same unit, mine came with 4000 lb axcels AL-KO and trail express "c" rated 50lbs. CP.225/75/15 Put 6000 miles on them before I had a blow out, then changed to Marathon "D" rated. You are legal, but at the max. within 250lbs I bet ya!. I have had Marathons on every trailer I have owned and been very happy with them. they are on my unit right now but still ST'S. You can put new GY "c" rated for your load but you might as well move up to "D" rated. Check the GY tire rating and the lbs. that you need to inflate them. to carry your load. To be honest their is no rime or reason, but that is what is put on the 8289WS supplied by lionhead..... You really do not need more then "C" rated you just want more ply.
Wouldn't more ply increase the rating? Guess I just don't understand??
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Old 08-15-2014, 07:54 PM   #8
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Wouldn't more ply increase the rating? Guess I just don't understand??
Yes you are right but And they are rated at like 2400 lbs per tire at 65lbs. PSI that really puts you over your axcel rate. Which is fine. But you will have a stronger tire. I think you would go from 4 ply to 6 ply much safer. But per GY chart you would still be able to carry your unit weight at 50 or 55 psi. I still run mine at 65 CP what they are designed for. Your rims ard stamped 60 lbs. max but they will hold a lot more then that.....
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Old 08-15-2014, 10:47 PM   #9
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Don't understand your statement at all. If they don't make it, how can they be installed?
That's why I said "I don't think". The "off shore" OEM ST tire manufacturers can quickly build tires to fit a vehicle manufacturers requirements. I looked up the specs for the OPs trailer and am pretty sure the certified GAWRs are somewhere in the 4000# - 4200# ballpark. Therefore the ST225/75R15C has the necessary load capacity to satisfy the minimum needs of those axles. Upon further research I found that Goodyear does make the Marathon in that size and load capacity in their China plant.


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Old 08-16-2014, 02:35 PM   #10
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4000 lbs/axle on LRC tires (=93% capacity) might be OK on perfectly paved, straight roads but we don't live in that world no matter what FR thinks. Tires take a lot of abuse here in the real world and I'll take a 21% safety margin instead, thank you very much!
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