Roller Derby Skate Corp Laser 7.9 Boys" Speed Quad Skates, Black: * Reinforced comfort-fit boot with a heel stabilizer and a padded collar * Skate chassis: Tru-Trac * 54mm wheels * ABEC 7 bearings * Laces and Velcro power strap * Available in six sizes See our entire assortment of bikes and ride on toys at Walmart.com.