Player's Choice Roller Hockey Wheels HILO SET 76mm / 80mm 78a Soft Blue Indoor Inline Skate 76mm / 80mm 78A Indoor Sport Court Inline Wheels These wheels are perfect for indoor skating, and utilize the standard size 608 bearing hub. If you only wish to use your wheels on outdoor skates, you should look for wheels with a harder duromer (80A or higher). HiLo Set Contains 4 76mm and 4 80mm Wheels