Have you taken a good look at your mc tire after it's been on for awhile? I get about 15,000 out of a ME880 marathon. That's because I use my BA to ride to work 109 miles every day. By the time it gets to 10k for the most part it is in the shape of a car tire and bald to boot. In the old days, the 60s and 70s, the tires that were on my bike looked just like car tires and lasted more like them too. The reason for the shape of the modern motorcycle tires, is to rotate around a corner faster/quicker. And the bonus to the tire companies is you buy more tires. If I were riding my BA strictly on the twisties I would not even consider this, but as a cruiser, I am considering it. It works fine on my touring bike but it would be very bad for my R1. I have been told I am crazy for some of the things I have done in my life, but most people have no idea how much thought goes into the things I do, before I do them. That and being well coordinated and a massive amount of good luck never hurts either.
