I'm riding on BT020's with aproximately 15,000 miles. I'm looking forward to soon riding on new BT016's and getting that "new rubber" feel again. Is the rear squared off? Sure, but, it's still getting me around corners/bends, curves with considerable lean. I rarely throttle jerk so it's probably contributed to me getting more mileage out of my tires. And, I'm sure that I continue to ride my tires worn down more that some others will say they want to. I run about 40PSI in the rear (I weigh 210 lbs). on a side note, I hope the same, "oh sh__" misfortune that some other forum posters have had doesn't afflict me just after I'm riding on my new 'stones---you know, NAIL or something!