Re: [A/S] Goodyear tire question

[Herb Spies <spies@xxxxxxxxxxxxx>]

 From the Vintage Airstream FAQS

"Q: I'm not sure of what size tire to get for my trailer, as it seems 
the original sized tires are not readily available. What should I do?
A: Best bet is to get the trailer to a dealer, provide them with as much 
information as you can, and let them match, mount and then install the 
tires. That way if there is an issue, they are responsible for making 
the tire fit. Generally, the tire used on the older trailers were 7.00 x 
15 LT (Light Truck) bias ply tires of the era. Some exceptions are the 
small 15 to 18 foot trailers, which used a 6.70 x 15 LT tire, as were 
some early tandem axle trailers.
ST type (special trailer) tires weren't available back then - the same 
with radial tires. The ST has a stiffer sidewall than a passenger car 
radial and has UV inhibitors in it - not really an issue if you use the 
trailer at least 6 times a year to release the friction activated 
inhibitors, and protect the tires from the sun while in storage. Radials 
were used, usually the 225SR15 size once they came out in the '70's. You 
can retrofit radials in some cases where clearance is not an issue, but 
it is recommended to use the ST type, as the average radial sidewall 
flexes too much when used on a trailer."

I followed this advice on my 63 19 foot Airstream and put Goodyear 
Marathon ST 225R15s Load range D rated at 2540 #. They are a very tight 
fit but did fit in.  Max pressure is 65#.   My trailer weighs about 3500 
# loaded trip weight.