Related Clues:

• Under-car bar
• Wheel site
• Wheel-to-wheel rod
• Drive-train component
• Trucker's toll unit
• Hot rod rod
• Wheel link
• Auto shaft
• 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