The problem with that technology is when the side wear down you are riding on a very thin front tire, I think my E3 was about 1" wide. That is twichy steering. I don't take cornor fast but I guess even big curves at 70 mph wear the out sides of these tires. I have a Mitchelin on now with that same hard center & soft sides, doing the same thing. The hard center on it is about 1.25". 10K and its getting twichy. Going to go to the BT-45 next.