rollerblades are what i have found to be the best way for heftier guys and gals to get around fast. it also helps if you have wheels attatched to your abnormally large tail. unless you want rugburn on the underside of your tail, which would be kinda painful considering the speed you're going and the rough concrete. it would also slow you down probably. unless you don't have a tail like that in which case you would be fine.