Removable Speed Control wheels for beginners, two high-performance replacement wheels for "pros," and size-adjustable, boot skate styling! Two Speed Control wheels slow these skates down for beginners, giving them a little extra control (and a big boost of confidence) as they develop skating skills. When they're ready to roll with a need for big-kid speed, it's easy to switch the rear wheels for a faster, high-performance inline skate. Skates adjust to fit sizes 12 - 2.