Related Clues:

• Car's four
• Spares, maybe
• Old Glory et al
• Dunlop offerings
• Auto wheels
• Quartet on a car
• Car's quartet
• Ones pumped up for a race?
• Yokohama or Hankook products
• Tricycle trio
• Becomes weary and in need of rest
• Mailbox attachments
• Station wagon's wheels
• Loses stamina
• They may fly at half-mast