Player's Choice Roller Hockey Wheels HILO SET 72mm 80mm Soft Blue Inline Skate Abec 5 Bearings 72mm / 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 72mm Wheels, 4 80mm Wheels, and 16 Abec 5 Bearings