I had a set of racing scrubs that I got when I bought my bike, dunlop k591's. Started by changing just the front test rode it and it seemed great so did the back too. So far they're pretty good tires 130/80/16 front 130/90/16 back. There doesn't seem to be any vibration or bouncing at all seems very smooth. Back tire was much easier to change then the front. Has anyone else ever changed their own tires?