What is the centre of a wheel called?
Hub. The hub is the center of the wheel, and typically houses a bearing, and is where the spokes meet. A hubless wheel (also known as a rim-rider or centerless wheel) is a type of wheel with no center hub. Hub. Centerbore: The large hole in the center of the wheel which fits onto the axle hub assembly and carries the axle’s load. This hole must be at least the same size as the axle mount or larger, or the wheel will not fit.