Hong Kong Cap
Cap Wheels snap onto early Redlines from 1970-73. They are the front half of the wheel, and must snap onto the black-disk back attached to the axle.
If you can see a small white or pink bearing in the center of the wheel around the axle, you need “Bearing” style wheels. If the wheel is solid black on the backside without the small white or pink bearing, then you need “Cap” style wheels.