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Old 07-12-2017, 10:08 PM   #1
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Default HiLo weights (1992 18TD)

So I was looking at PDF's of the different models on the new HiLo site (http://www.hilotrailer.com/pdfs/1992-towlite.pdf) and noticed the weight for the 1992 18TD is listed as "Axle weight 1710" and "Hitch weight 190".

This kinda threw me off since it's not listing UVW.

Am I correct in assuming this means it actually weighs 1710+190=1900 lbs unloaded?

Why would it need 2 axles at this weight?

Attached pic is the spec section from the PDF.
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Old 07-13-2017, 12:14 AM   #2
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Probably doesn't need two axles, but if you look at the tire size: 13"; I think you'll find tires in that size would not support that weight on a single axle.

The newer 18ft Hi-Los came with 15", Load Range C tires, and they and the axle are rated to support 3500#. This is kinda ridiculous, since the Max Gross Weight of the trailers is above that.

- Jack
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Old 07-13-2017, 12:39 AM   #3
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How did I know you'd be the first to reply?

The smaller tire makes sense - 13"s are TINY - I have them on a small utility trailer and they are awful, load rated a few hundred pounds each (trailer max load is 1200 I think). Though I've certainly abused them past the rating (I know, I know, I'm a bad trailer-er).

Thanks for the perspective!
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Old 07-13-2017, 08:45 AM   #4
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Now you guys are getting me concerned! The tires on my 2176B are 14". But the tires on my "new" 2600TFB are only 13"? But no skirting to get in the way.

Doesn't make sense. They are a mixture of Maxxis & Goodyear, and I think at least most of them are only C rated. On my 2176B I did upgrade to regular High Pressure Tires (50# Max Pressure) several years ago. They were always tough to get off, but with leaf springs, so jacking on the frame or the Axle didn't matter.

Since my Trips are usually only 200 miles one-way, I suppose that wouldn't be a long enough travel to worry about the 13". Although, I'm fairly sure I load heavier than most, for two weeks, with extra Well Water, many chairs and Firewood too!
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Old 07-13-2017, 10:27 AM   #5
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Quote:
Originally Posted by KnottyRig View Post
How did I know you'd be the first to reply?

The smaller tire makes sense - 13"s are TINY - I have them on a small utility trailer and they are awful, load rated a few hundred pounds each (trailer max load is 1200 I think). Though I've certainly abused them past the rating (I know, I know, I'm a bad trailer-er).

Thanks for the perspective!
I might be too much of a "know it all", but tires and trailer weight are two of the things I've researched a lot after the cord separation failures I had on my OEM tires with less than 5000 miles on them. I was shocked to learn the GVWR of my trailer was 3800# with 3500# max load tires installed! I was also astonished to learn my trailer's "empty" weight was around 3300# - much higher than the "stated weight" on the placard.

So, I treat my tires with great respect and obey the 65 MPH speed rating limit. Since upgrading to better tires, I've had no further problems.

- Jack
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Old 07-13-2017, 11:01 AM   #6
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Yeesh, Jack! How much heavier was your trailer than it's published weight?

I'm a big fan of over-spec'ing things, especially trailer tires. It's very easy for them to get over loaded during a trip. On a 1600 mile haul I went through 4 tires on a 4-tire trailer (the trailer was properly loaded and balanced, and I took tire temps at every stop). Fortunately I carried 2 spares (seems like overkill, right?)

So with the C rated 13" tires, at max pressure, what's their load capacity?
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Old 07-13-2017, 01:27 PM   #7
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Knotty, your question depends on the actual tire used. I'm posting a picture of a tire chart that Goodyear provides for their Marathon brand, and it seems to apply to other brands I've looked at.

From this, I'd say that 4 - 13" tires are overkill on the trailer you were talking about.

Perhaps the axle weight ratings on that trailer are much lower. I'm just guessing, naturally. But in trailer design, you ideally don't want to exceed 80% of the maximum ratings for safe use. (Forgotten where I learned this, but I've seen it in several places.)

The unloaded vehicle weight of my trailer with an empty fresh water tank was SUPPOSED to be 3001#. (That's from the placard that's installed inside showing all installed options.) But, when I weighed it in that state it was very close to 3500# (I stated the weight wrong earlier - blame it on my fading brain cells.) And, this is with less than 100# of personal items such as pots & pans, dishes, a few hand tools, two sleeping bags, and so on.

I've since added 12# of thin solar panels, a controller, larger tires, and a second battery.

- Jack
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Old 07-13-2017, 02:52 PM   #8
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Jack, Just checked mine to be sure. The Spare is a Goodyear, only Load B & 35#,and there are no other Goodyears on it!

All are ST175/80R13s, 50psi on the ground. I have 1 Maxxis, 2 Tow Master, and 1 Heartland! One of the Tow Masters and the Heartland are on the Drivers side and evidently are fairly new because the knubs are still on the tires sidewalls.

But, looking at the GVWR of the "C" Load tires, they are only rated at 5440# total. The RV's GVWR is 5500#. This all per your chart above. So I suppose I should pick up at least a couple of higher rated new tires before September. Blast it!
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Old 07-13-2017, 07:20 PM   #9
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Default Buying new tires

Think of it as buying yourself a christmas present. I would highly recomend that you get the tires balanced. Not all tire places do this. We just had to buy ourselves a very expensive Christmas present and all the holidays combined. Our Central AC unit died after seventeen seasons. It sure cost more than a set of trailer tires.
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Old 07-13-2017, 07:32 PM   #10
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Default a very expensive Christmas present

Problem is, all I can find in 13" Trailer tires are C1 for the highest rating! I think I'm stuck.
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