Related Clues:

• Firestones, e.g.
• Foursome for a Ford
• Pit crew's supply
• Loses interest
• Grows weary of rites
• Needs a break
• Rolling set
• Sonata quartet
• An American car has four exhausts
• A motorist may change them
• Tuckers (out)
• Garage stack
• Michelins or Goodyears
• Starts to sag
• They often have belts