Roller skates have always been recommended for fitness freaks. They can be fun and a eco-form of transport. Roller skates allow the skater to travel on boots which are generally equipped with three, sometimes four or five wheels. Roller skates have two basic designs: Quad Roller Skates: A shoe that has been equipped with four wheels. Inline Skates or Blades: These skates have three, four or even five wheels in...