The Viper M4 speed skate features a retro style low cut boot with a Viper Speed RTX frame with Action Control System, ensuring that you experience maximum control whilst skating.Specification:  Deluxe speed profile boot with comfort padding and reinforced support Full lace system with velcro power strap RTX Pro Series frame 58mm x 40mm MAG core urethane wheels Smooth and fast ABEC 5 bearings This is a very basic skate for roller debry