Well I finally got a chance to put some miles on the new set of Dunlop K591's. Here is the good and bad: Good: Feel like I can flick my dyna into corners now. My old tires were pretty flat on the bottom due to amount of freeway riding I do and getting on some turns with new rubber is awesome. I can equate it to the feeling you get playing baseball and warming up your swing with a donut weight.....take the weight off the bat and the bat feels light as a feather. I had the same feeling with the bike.....barely push the bars and you are banking a corner. Bad: Riding 2 up on new rubber. Took my son on a benefit ride for Molly Bish foundation yesterday. The old tires were flattened on the bottom so when my passenger got fidgety I could barely notice it. Now with the new rounder profile when my boy shifts his weight I can really feel the bike move around! Had to tell him to sit still! Anyway......the ride for the Molly Bish foundation was great. Had a great weekend of riding!