Teach your little girl to skate with the Roller Derby Firestar girls' roller skates. They feature a torsion-beam frame that requires no maintenance and the padded collar with a VELCRO brand closure strap ensures a perfectly comfortable fit. The skates ride on the superb Excellerator 608ZB bearings and 54mm wheels.Teach your little girl to skate with the Roller Derby Firestar girls' roller skates. They feature a torsion-beam frame that requires no maintenance and the padded collar with a VELCRO brand closure strap ensures a perfectly comfortable fit. The skates ride on the superb Excellerator 608ZB bearings and 54mm wheels.