Or, you can look at it another way! From the report by SURMAN1322 we can deduce that 50% of Marathons fail in a catastropic way! You don't have to know the outcome of every tire to be able to predict the outcome of a few tires. For 2airishuman, we could deduce that 33% of Marathons are near failure after 30,000 miles of frequent checking. Obviously these deductions are about as accurate and absurd as saying Goodyear ships 100,000 Marathons but we're only hearing about the 20 tires which prematurely destructed. Bottom line is do you feel perfectly safe and comfortable using and trusting your family and valuables to them. If they leave you feeling a bit uneasy, perhaps a safer more trustworthy alternative is available.
I also find it amazing that we accept without question the necessity to constantly be monitoring and adjusting our trailer tires when we wouldn't think of giving that much attention to the tires on say, a car or pickup weighing about the same as the airstream. Take a 5500 lb. Airstream and a 5500 lb. Ford F-250. The person driving the Ford in the real world isn't going to spend near as much thought on his tires for the truck as he does the Airstream. Makes a case for getting better tires for the Airstream.
Before you fall too much in love with your ST Marathons you should read post #14 here:
http://www.airforums.com/forum...iler-1392.html
ST tires are just passenger tires made heavier! They are not commercial grade tires. As you can see, this discussion has been going on for a while.