TOWMASTERS (Greenball)
I have to agree with most of the comments made regarding the Towmasters, Goodyear Marathons, Carlisles, etc. All of these leave a lot of room for improvement.
Some of the Towmasters are made in China. Mostly, the bias plyed tires. The radials are made "In Canada" (stamped on the sidewalls of my tires) in the Goodyear plant. I got this information both from Goodyear & Greenball. It took many phone calls & finding the right person that was willing to divulge the information that I was looking for.
In my circumstance, I went up 2 sizes & 1 load range, on my replacement tires & have had no problems. My trailer is 25' & weighs in the vicinity of 7000 lbs. I never had any problems with the original 205/75/15 Marathons, which, were the old design that was much more prone to "coming apart".
The old design Marathons had steel & polyster in the tread plies. When they got hot, the plies would expand & contract. Many with that design detonated, prematurely.
The new design incorporates steel & polyster but, they have added an outer ply of nylon, now. The nylon does not expand when it gets hot & acts like a girdle, holding the steel & polyester plies in place when they get hot. The result has been less explosive tires.
One of my friends had an "old design" Marathon blow on a trip. He replaced all the tires with the "new design" Marathons. However, he kept "the best" of the old tires, for a spare. When he got home, the spare had blown & it wasn't even on the ground.
The 65 mph speed limit on these tires, is true. I asked Goodyear about that limit & the Rep. said that that's what they had been tested to. On my trip back to Phoenix from Thunder in Muncie (2004), with the new tires, I hit 85 mph, for about 2-3 hours, chasing a Ford with a horse trailer, in So. Colorado & No. N. Mex. I had no problems & still have the same tires on the trailer.
I know it seems like I'm trying to build a defense for Towmasters but, I'm not. I think I've just been lucky. I agree that the quality of trailer tires is just plain lousy. I seem to see more problems with Carlisles, at this time. Guess it's their turn in " the basement of the outhouse".
Eventually, I think I may go the the heaviest LT tire I can find in my size.
Joe
f. (Buffalo)