Related Clues:

• Becomes weary
• The wheels on the bus, e.g.
• Saturn's four
• Applies the brakes
• Rim attachments
• National symbols
• Some spares at the chop shop
• Semi's 18
• Rotated car parts
• Firestone products
• Road rollers
• Recaps, for example
• Blowout alternatives
• Refs throw them
• Treaded things