Rollerblade Crossfire 90 Skate New ultra-light and maneuverable performance skate High-end components make this a well-rounded maneuverable skate Stronger lighter magnesium frame dampens vibrations for a smoother ride - 280mm Active 90mm 84A durometer wheels coupled with high end SG9 bearings Crossfire is one of the best selling skates in the world. A great fitting skate designed for all around use.90mm wheel set up is an ideal for all conditions, smooth on rough surfaces.