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Old 07-23-2015, 03:32 PM   #11
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I think they stamp it in the rim. along the inside.
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Old 07-23-2015, 03:33 PM   #12
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I'll look around and otherwise will contact Lionshead.
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Old 07-23-2015, 03:38 PM   #13
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Rims are rated for weight; not pressure.
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Old 07-23-2015, 03:40 PM   #14
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The first rule of tire club is .......
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Old 07-23-2015, 03:44 PM   #15
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To test the Facebook commenter's comments, I did the math:
So, for 215/75r17.5 it's... 215 * 75 * 2 = 32,250. (32,250 / 2540) + 17.5 = 30.2".

My current tire is ST235/80R-16E1 which works out to (37,600 / 2540) + 16 = 30.8".
Sure enough, new H-rated LT tires are about 1/2" smaller in diameter than my current tire.

The problem is, it's new wheels, tires, about $2,000, the whole 9 yards. And, it reignites the ST vs. LT tire debate. (But, I do know some higher end/heavy/fulltiming units are already coming with LT tires stock; so it makes me feel a little better.)
To muddy the water a bit, I'm looking around and it appears that 17.5" wheels and H-rated tires are actually a "commercial tire specially for trailers" vs. a LT tire. If that helps me be more comfortable.
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Old 07-23-2015, 07:12 PM   #16
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To muddy the water a bit, I'm looking around and it appears that 17.5" wheels and H-rated tires are actually a "commercial tire specially for trailers" vs. a LT tire. If that helps me be more comfortable.
If you look around at some of the forums where the RV trailers have 8000# axles you'll see that the low platform truck (trailer) tires LRJ & LRH of numerous brands rule the roost.
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Old 07-23-2015, 09:56 PM   #17
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Dang Doug, if those numbers are correct, you sure don't have much wiggle room in weight.

If you are wanting peace of mind in the numbers area, there are a few options, none of which are cheap.

Goodyear makes a 14 ply rated 235/85R16 tire that has a capacity of around 3,750 lbs per. The problem here, is that it runs at 110 psi and you might need new wheels to boot, to carry that kind of air pressure safely.

Utilizing your same wheels, you could shop around and find a tire like the Power King Towmax. According to it's specs, using the same size and psi tire you currently have... they rate theirs at 3520 lbs.

Moving up to a 235/85R16 in a Towmax, with the same 80 psi nets 3640.

The clearance between the tires may be problematic too. A 235/85R16 is about an inch difference of diameter from what you have currently. However, once you measure from the center of the hub, it works out to be 1/2 inch on top and a 1/2 inch on bottom...or the 1/2 inch front and rear of the tire, if you can picture what I'm saying.

Using a 235/85R16 is going to be 1/2 inch taller into your fender well, and make the TWO tires 1 inch closer together (1/2 inch per). It will also raise your trailer off the ground 1/2 inch....so you may have to step a little higher.

As far as the Power King Towmax, I have no recommendation on the brand itself. Research at your own risk.

Towmax STR II Tires | Own The Road

Carlisle sells ST tires with the same specs as the TowMax and even has a 12 ply rated 235/85R16 at 95 psi and 3950 lbs.

Radial Trail RH Trailer Tire

Moral of the story is, there are different brands out there, with different capacities. You just have to look around and see what you want and feel comfortable using.
I just replaced two Towmax tires mfg 2412, crack in sidewall on one, bulge at corner of tread on the other, just info.
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Old 07-24-2015, 01:15 PM   #18
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Michelin XPS Rib

Michelin XPS Rib. All steel. Expensive but worth it. We had them on 16" rims previously and when we downsized to a smaller TT it had 15" rims. Their smallest is 16". Wish I could get them in 15".
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Old 07-24-2015, 01:28 PM   #19
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Michelin XPS Rib. All steel. Expensive but worth it. We had them on 16" rims previously and when we downsized to a smaller TT it had 15" rims. Their smallest is 16". Wish I could get them in 15".

Problem with these is the carrying capacity is actually lower than equivalent ST tires. I'd be MORE overloaded with these on than I am currently.
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Old 07-24-2015, 01:39 PM   #20
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Here are the max pressures of Lionhead which you said supplied the rims. It go'd by PSI and then the weight it can hold, I'll attach it. See if your rim is one of these.
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