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Old 04-16-2013, 05:07 AM   #11
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I will be replacing my original Marathons with G614's within the next couple of weeks. The original tires have caused no problems and only have a bit over 3,000 miles on them, but they are 4 1/2 years old so...........they are almost gone.
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Old 04-18-2013, 09:26 PM   #12
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I have LT tires instead of ST on my 36 foot Designer. Never had a problem thus far. I have heard too many disaster stories with the ST tires, and I have noticed some manufacturers are putting LT's on as a factory option.
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Old 04-24-2013, 01:18 PM   #13
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If your tires are 15 inch go with the maxxis E rated tire. If you have 16 inch wheels I would buy LT load range E tires.
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Old 04-29-2013, 08:49 PM   #14
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Am I understanding correctly. Buy "LT" you are referring to "Light Truck" tires.
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Old 04-29-2013, 10:02 PM   #15
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Yes, LT = light truck.

Something to consider with ST tires. If the OP opts for E rated tires (where D would be sufficient) solely to run on "stronger" tires (8ply vs 10ply), what psi should be used? Assume that the wheels are rated at a max of 65psi. If running an E tire at 65psi (or less), would this lead to premature tire wear (due to heat build-up)? (same issue if the psi is based on a mnfr's load capacity chart which may be lower than the max psi stated on sidewall). On the other hand, if the wheels (or new ones) can handle the higher psi and the E tires are inflated to 80-85psi (cold), what effect would the increased vibration have on the trailer (assuming no shocks on trailer to dampen the vibration) due to the stiffness from the E tires?
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Old 04-30-2013, 08:53 PM   #16
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I switched to LT's 3 years ago and knock on wood not one issue. Just as a general rule of thumb most manufactures but not all in the trailer,automotive,tractor or anything that utilizes tires uses the cheapest product they can get.
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Old 05-03-2013, 12:56 PM   #17
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As far as I know wheels do not have a speed rating on them but they should have a # rating on the back side of them.
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Old 05-03-2013, 01:33 PM   #18
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I had Marathons on a previous trailer. One that was as spare decided to 'explode', was just mounted on the back of the trailer. Another incident included having to hastily do a tire change on the side of the highway. Never again.
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Old 09-24-2013, 12:54 AM   #19
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The best 16" tire that I've found for my 5th wheels have been the Michelin XPS. They're not cheap - about $300 each, but they are the only tire I'm aware that has steel-belted sidewalls as well as the steel belts under the tread. I've never had one fail and never talked to anyone who has, although I'm sure there is probably an exception out there somewhere. I'll be picking up my new Premier on Wednesday and will be replacing the factory tires on Thursday with the Michelin XPSs.
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Old 09-24-2013, 07:00 AM   #20
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My trailer came equipped with Goodyear Marathon load range D 15" tires @65 PSI. When those had to be replaced, I verified the maximum cold inflation pressure of my rims to be 80 PSI. I bought Maxxis load range E tires, and keep them inflated to 80 PSI cold inflation pressure. I've driven with the Maxxis tires for about 7500 miles so far, primarily in the summer in Texas and have had no issues other than a tread puncture with a 1/4" x 20 bolt, which my TST TPMS system notified me of before any damage occurred.

Rims (wheels) have both a weight rating and a maximum cold inflation pressure rating. Here is a chart from Dexstar, which made my rims: Dexstar Product Information.
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