My fondest memory of my Marathon tires.
Not sure I can say this with respect to a large number of the Marathon failures that have been reported here but in my case I think the weaker side walls caused rim leaks on hard turns. My tri axle trailer puts a lot of stress on the front, and more importantly, rear axle during a tight turn. So much so the deflection is notifiable in the mirrors. Any shock to the tire while under this stress could cause a rim leak and reduce pressure below the critical point and thus heat build up.
Thus another reason why I now run E rated tires.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles