5/16" "Frog Washers" from Sure-Grip. These axle washers are thicker than a standard washer with a unique shape to grab the inner race of the bearing. Place one against the inner bearing and one against the outer bearing. They'll ensure a smooth performance for the life of your bearings!
Choose from 8mm (most common) and 7mm washers (used on antique skates and some European brands).
Set of 8. Please purchase 2 packs if you plan to add a washer to both the inside and outside of each wheel.