After getting only 6000 miles on my rear Shinko 777 tire, i just ordered a Firestone 175 / 60R / 16 and will be joining a couple buddies on the darkside. Did all the research but mostly convinced by two guys in our group that are doing it. One has over 35K on the rear and it looks about 65% left. He also runs one on the front but im not going there. They both said for the first 15 minutes they noticed a very small difference and after that they forgot all about it. We do about 120 to 175 miles per Saturday trip and most is the twisty stuff. Never noticed them not keeping up. Should be interesting when i get to test it out. The tire is about 1/3 the cost of a decent motorcycle tire and would work well on a west coast to east coast and back trip i have be planning for a long time. Wont have to change the rear at all.