Burbman,
Very interesting topic. I have been running on Goodyear Marathons now for 10 years with no issues except dryrot. When I put a new set on last year, my tire dealer looked at me funny and had to order them as he didnt stock them. However they never questioned me about it. We are about to purchase a heavier tt and I saw in the photo that it comes with Load Star tires on them. When I get there I will be curious about that. Admittedly as I havent had an issue I never really thought about it except to keep them inflated, repacked by bearings everyyear etc.