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Old 07-10-2009, 12:31 PM   #1
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Rivet Need tires 7.00 17lt

i can't find tires to replace the 7.00 17 lt tires i have on my 73 soverern. does anyone know what size tire can be used to replace them?
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Old 07-10-2009, 12:43 PM   #2
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i can't find tires to replace the 7.00 17 lt tires i have on my 73 soverern. does anyone know what size tire can be used to replace them?
You should not be using 17 inch tires on your Airstream.

As the axles age, the rubber rods give out, especially from 1974 and older, as per Airstream.

With oversized tires, you will cut holes in the wheel wells with the tires.

If your wheel wells are plastic, you could start a fire.

17 inch tires should not be used even with brand new axles.

A few owners have switched to 16 inch tires, and time will tell if that was a wise thing to do.

Andy
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Old 07-10-2009, 12:53 PM   #3
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I have a 73 Overlander and I replaced my old tires with Maxxis 225/75 R15. I made my decision by reading about tires on this forum. So far I have been pleased with them.

Brian
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Old 07-10-2009, 06:53 PM   #4
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Tire sizes are denoted by not only construction and intended type, but ordinary physical descriptions: height in inches, section width, tread width, correct mounting rim size, etc.

In terms of changing from one tire description to another this is a handy way to make sure one has the correct size.

For what it is worth, I would not have 17" tires on my trailer (oem size 15"); I'd start again with stock sizing and make comparisons from there.

Travel trailers have very little suspension travel, overall. Even an Airstream.

Tire Size Conversion Chart

Tire Tech Information - Diameter Comparison of Light Truck Tire Sizes

Tire Tech Information - Load Range/Ply Rating Identification

I was earlier reading an AVION manual and noted that the tires recommended in 1972 on 25' and 28' trailers (6800-lb GVWR) were H78-15. This was a tire that was, according to COKER TIRE, about 28.3" in height, the same as a 225/75-15. I cannot find a "true" old chart to give me the exact info on tire height, but it should be within an inch.

The second note was that AVION wanted the tire on a Load Range C tire; the obvious replacement would be a GYM in 225/75-15, L-R C as the weight rating is consistent. The same size L-R D would not be. The first is a 50-psi tire, the second a 65-psi tire.

Of course, a trailer tire should be mounted on a rim with a weight rating well above what a conventional auto wheel would carry.

On my '83 Silver Streak I cut a finer margin with a tire that was a full one inch taller than an H78 tire, a 7.00x15 Yokohama that I felt was better built than the GYM.

There is bound to be a truck tire service center in your area where the farmers or service contractors bring their small trailers in for tires, and could be of help to you (maybe some old rims you could use).

Good luck.
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Old 07-12-2009, 06:59 PM   #5
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Thanks for your help, I will replace the 17 inch wheels with 15 inch rims and get the right tires. I just got the 73 soverign, it had the wrong tires on it . david
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Old 07-13-2009, 06:05 AM   #6
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I forgot to tell you on those 225 75 r15 I used "D" for trailers. I was told that "C" were not made for trailers.

Brian
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Old 07-13-2009, 06:09 AM   #7
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I forgot to tell you on those 225 75 r15 I used "D" for trailers. I was told that "C" were not made for trailers.

Brian
Airstream used tens of thousands of the "C" tires.

Andy
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Old 07-18-2009, 05:17 PM   #8
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Goodyear Marathon Radial

If this is the tire "specified" then it would be my choice with which to compare all others (not brand, but technical specs).
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