The Rollerblade Macroblade 100 Inline Fitness Skates for Women have the largest wheel configuration of the Macroblade Series. Built to perform at exhilarating speeds, they are constructed with seamless seam boots to provide optimal support, comfort and stability. The Twinblade Extruded Aluminum Frames are just 12" long, allowing for great speed and acceleration, while still short enough to provide a good level of maneuverability. Rollerblade Supreme Wheels and SG9 Bearings ensure quality roll on any surface and will allow a great mix of grip and speed. Best suited for serious skaters that want a high performance skating experience!