Amazon.co.jp: BEARING 608 Skate Board for Inner Diameter 8 mm Outer Diameter 22 mm Set of 10 : Sports & Outdoors
10pcs Skateboard Bearing Double Rubber Seal Shield Micro Deep Groove Bearing Suitable For Skateboards, Scooters, Roller Skates - Bearings - AliExpress
The standard 608 bearing is 8mm x 22mm x 7mm and this “special” bearing has an inner diameter of ¼”. http://www.vxb.com/page/bearings/… | Skateboard bearings, Bear