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Old 10-17-2016, 09:13 PM   #1
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D or E tires?

I am currently running load C tires on our camper and they are in need of replacement. The axles are rated for 3500# (dual axle). The wheels are rated at a 80 psi max per Jayco customer service. Should I go with a load D tire inflated to 65 psi or E inflated to 80 psi knowing that they are both beyond the maximum axle rating (which we will likely not get to)? We tend to stay within a few hundred miles of our home, but in a couple of years we will be going on an 8000 mile cross country trip.
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Old 10-17-2016, 09:35 PM   #2
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I would go with E rated Maxxis


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Old 10-17-2016, 09:41 PM   #3
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What is the cost difference between the tires. The D rated tire will handle your load, the advantage the E gives is it will have significantly less sidewall flex. This is an important consideration on the tow vehicle but not nearly as much on the trailer.
Personal preference would be the E rated tire as it will run a bit cooler.
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Old 10-18-2016, 06:12 AM   #4
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What model is your trailer? People will automatically say go with the heaviest tires without even knowing if you really need them.
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Old 10-18-2016, 06:45 AM   #5
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What size are your rims?
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Old 10-18-2016, 07:13 AM   #6
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I have a 2012 Jay Feather Select 29L.
5,365 lbs dry and 7,500 lbs GVWR

Tire size is 205/75/14

I just did a quick search and I am not seeing a load E option for my size so it may be a moot point.
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Old 10-18-2016, 07:31 AM   #7
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Yeah, the highest I've ever seen is "D" 8 ply in that size.
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Old 10-18-2016, 08:46 AM   #8
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Quote:
Originally Posted by bap View Post
What model is your trailer? People will automatically say go with the heaviest tires without even knowing if you really need them.
IMO, there is some advantage to over-specing tires. If you do the math, you might come up with a certain load range as an "adequate" tire. However, if you look at the money and peace of mind, the increase in cost to get the next level load range is often worth it. I like to be well within the capacities of my tires without having to bust out a calculator. In my eyes, the tires will run cooler, have less sidewall flex under load and thus last longer with better performance.

In my case, a LR D tire will technically work within specifications (just enough IRC). When I replaced them, LR E tires were readily available in my size at about a $5 delta per tire, so I threw in the extra $20 to get the LR E tires. I feel much more confident about my tires now because I know they're not being "tested".

There is also speed to consider. Some manufacturers will allow for 75mph if the tire is filled to 10 PSI above the pressure for the rated maximum load. While I don't make it a habit to go that fast, it has happened, and I know my tires can handle it.

All that being said, I'm not sure there would be a benefit of putting LR E tires where LR C were spec'd. Perhaps just one level of increase is sufficient? Like from C to D, or D to E?
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Old 10-18-2016, 09:10 AM   #9
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Here are the available sized in Maxxis:
Trailer Tire Load/Inflation Chart | Maxxis Tires USA

Looks like they are not available in a D range for a 14 inch rim.

You may have to go to a 15 inch rim to get a higher rated tire.
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Old 10-18-2016, 12:21 PM   #10
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I went from load C to load D (13"), the increase brought me well into a good safety margin. I went with the new Carlisle's HD, they handle nice.
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