Related Clues:

• Wheels connector
• Part of a gyroscope
• Wheel contact
• Toll unit for trucks
• Car-toll unit, often
• Support shaft
• Device for rotating one's tires?
• Assembly line add-on, perhaps
• Highway toll unit
• It may have a linchpin
• Wheel connection
• Drivetrain connection
• Plaything for a kitty
• Wheel supporter
• Revolutionary car part?