A wheel spacer is a component used to adjust the position of the motorcycle's wheel relative to the axle or frame. Typically made from metal or high-strength composite materials, wheel spacers are installed between the wheel hub and the axle or between the wheel hub and the fork or swingarm. They are used to correct wheel alignment, accommodate different wheel sizes, or enhance handling and stability. Proper installation of wheel spacers ensures optimal wheel positioning, preventing issues such as uneven tire wear and ensuring smooth operation of the motorcycle's suspension and drivetrain.