Tire Wear - Page 2 - Fiberglass RV


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Old 03-09-2003, 08:48 PM   #15
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Tire Wear

Got it now! I'm definitely going to upgrade this spring. Thanks for the excellent help everyone.
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Old 03-10-2003, 06:31 AM   #16
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Dan ... yes, there are tires made specifically for trailers.

They carry an "ST" on the sidewall.

From your tire markings, it sounds like you are running your trailer on passenger car tires ...

You should upgrade to the proper size in a ST tire!
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Old 03-20-2003, 09:54 AM   #17
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Spare tire mount?

Wow, I just got the new 14" tires for my Casita 16 SD and can't believe the size difference. This should be a big improvement but now I have another problem. The spare tire mount bolt on the back of the Casita is below the center of the hole in the wheel. I could just use it as is but it seems to me that the stress on the fiberglass will be considerable. The 14" tire and wheel is much heaver and the majority of the weight will be above the attachment point. I can't help thinking about levers and that mechanical advantage stuff that I learned in school. Anyone have a better idea? I would hate to have the rear end fall out in the road.
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Old 03-20-2003, 10:50 AM   #18
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13 to 14 conversion

Craig:

After the conversion, the bolt is an inch or so off center. But with the tire resting on the bumper, the fiberglass 'washer' still covers the center hole of the wheel and holds it snug against the trailer.

Seems to work OK?! :)

P.S.: If you have a tire cover, you know the routine for fitting it?!
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Old 03-20-2003, 11:59 AM   #19
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Tire Cover??

Don,

That was my next question. No way is that itsi cover fitting on the new tire.

Craig
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Old 03-20-2003, 02:39 PM   #20
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tire cover

Right, the old tire cover won't fit!!!
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Old 03-20-2003, 03:32 PM   #21
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Once upon a time, with a previous trailer (16' Jayco) I had need to change tires out on the road as they were worn and the only tires available were P's. What a difference! That sucker wallowed like a pregnant duck going down the road, and I could even tell the difference just stepping into it. Got some ST's quick as I could and all was stable again!

Pete and Rats
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Old 03-21-2003, 01:58 PM   #22
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Tire mounts

I didn't like the idea of a tire mounted on the fibreglass so I made a bracket ( L shaped with a flat plate on the end) and drilled two bolt holes in it to match up with the wheel bolt pattern. Then I welded the ass'y to the inside of the rear bumper, and voila- it fits any size tire and no worries about the body. I made the bracket out of 1"x1" Square tubing 1/8" thick, and a 6x6 inch flat plate. There are also store made tire carriers of all different shapes and sizes- try JC Whitney, or Cabelas marine section under boat trailers.
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Old 03-21-2003, 07:29 PM   #23
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Joe, you might consider running a stabilizer bolt or two to the fiberglass just to keep the tire and mount from torquing the bumper and setting up vibrations -- no weight on the fiberglass, just some horizontal bracing.

Pete and Rats
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Old 03-21-2003, 07:38 PM   #24
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Hi Pete
Good point on the brace.On my old MH I had I lost my spare due to fibration.It must have been swaying or what ever, but end result was that it broke off at weld.Lost both tire and Tire holder.
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Old 03-22-2003, 09:18 AM   #25
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bracket

I'll have to check my welds, but if they're bad I'll hang up my shield:sad , I won't say I've never seen a weld fail, but the way mine is done, I don't think it'll be a problem:shg . I have to get my own digital camera so I can put up some pics. I'm cheap, and kind of handy so I get myself in a few pickles:bh .Fortunately I have access to a shop and all the tools I could ever use, which is nice. I also get all my smaller bits of steel free as scrap from a friends shop.
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Old 03-22-2003, 02:12 PM   #26
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YOUR welds may be just fine, but the bumper itself may not have been designed with a swinging weight in mind, esp if you like to get off the main highways. Just a thought.

Pete and Rats who are not allowed to ride on the bumper
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Old 03-22-2003, 06:19 PM   #27
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hanging bumpers

You're right Pete--- I never thought about that. I guess I'll beef up the bumper too, because I want to put a bicycle carrier on it.
(Not that I will use the bikes, It's taken me twenty years to achieve my finely rounded figure) but it looks impressive going down the road.

Hoping my parts stay where they belong
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Old 04-16-2003, 11:02 PM   #28
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Steve L

I ended up having to put Sears LT tires on my Bigfoot tandem axle when I need tires while up in Alaska. Sears said these were the only tire that was built to take the loads of a comparable trailer tire which they didn't have available. Between an rock and a hard place with one blown out after traveling a "construction stretch" (gravel the size of rodents) and the others showing belts I took their advice and put on four.

These tires are starting to show inside shoulder wear like the others did but not to the point of replacement. You mention "dividing by 1.1 " to get proper loads and inflation. I'm not experienced using these tables. Would you kind enough to explain a bit more or give an example?

Don
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