Hey Chris,
Just had 4 Goodyear Marathons put on my 68 Tradewind they fit
great and run nice I only towed a hundred or so miles but it was on Pa
turnpike in the rain, dont get a better test than that. The size escapes
me but if you contact Jim or Mike at turner airstream they will give you
the correct size.
Pete WBCCI 5385 Al-Mon-O