The weirdest part of these skates is the 4x80 mm wheels which is a big change from previous reebok skates than ran 72-76-76-80 (I had the 4ks) and that will throw you off a little bit for the first hour or so, but then they become much better. These skates do seem to be a little bigger than my 4ks, but these ones haven't broken in yet since they're way stiffer. Good protection so far, only drawback is the 80 mm wheels, while giving you speed, can be clunky when turning and stopping.