I understand what you are saying. But the Pirelli MT66, Dunlop D404, and Bridgestone S11 are all designed for Cruiser/Touring bikes, not Sport. They are not "soft" by any means, and I understand that tires like the Michelin Commander and Metzler ME880 are made with tougher compounds. The front tire carries more weight than the rear under moderate to heavy braking loads, due to weight transfer. I understand tires are rated for intermediate loads such as this that are much higher than the max weight rating, which is based on continuous load at maximum inflation.
If I operate my pickup truck for 20 thousand miles at 6000 pounds on a fresh set of tires, then go 20 thousand at 8000 pounds with another set, I guarantee the second set will be much more worn, and the average stress over the life of the tire will be higher. That's what I'm saying about lower capacity tires. 71 H tires do not last on the Road Star, and 77's do, as some brands offer the same size in both load ratings.
