I've ran the 270's also, but I take corners too hard and they slide out on me. Plus there realy slick in the rain for some reason?
Cupping I am convinced is from hard breaking, thats how I wore out a 606 front before the rear!
All tires will eventually wear a flat spot in the middle, Ohio law is 1/16 in tread depth to be street legal. So I wonder how long thease mefo's will wear to that depth. Got 1000 miles on them now and still got tits on the front cetner knobs. Back is hardly wearing at all!! Only 1000 miles, but you would think they would show some wear?