Bearing Wheels have a receiver on the back for the small white bearing to go into. The small white bearing is attached to the axle.
All Deep Dish, Hong Kong and US Style Wheels Are Available.
Deep Dish are for that cool early Redline look.
Hong Kong are for the Classic Standard Redline look.
US Wheels are for the Uncommon US Castings from 1968 and 1969.
Each type is available in three sizes, and they are all interchangeable.