I know this is 5th wheel forum and I'm running a TT, but it is a 9500 GVWR TT. Anyway, I bought GY Marathons (LR D) 5 years ago but made sure the ones I bought were USA made. Had 0 problems with those but because of age, got them replaced just a couple months ago. Went with GY Endurance (LR E) because of the USA made, higher speed rating and Discount Tire online had a $100/set discount and the set I got were all manufactured in March 2017. I suppose posting to this thread was because wanted to mention these are tires that will not have been sitting around for a year or two if you do order them. They should all be very new.
Just did my first major tow and no problems to report. Seems the higher pressure on the E versus D load tires make the TT roll slightly better (might be only in my head though). Time will tell but hopefully I will have 0 problems with this set too.
