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7. Vehicle Components

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154
Safety Equipment - Tires

Tires

The minimum legal tread depth for tires is:

  • 1/32 of an inch for most passenger vehicles
  • 4/32 of an inch for busses, most trucks, and most trailers
  • 6/32 of an inch for snow tires
  • To avoid skidding, blowouts, and unsafe handling, the manufacturer's recommendations for your vehicle should be followed in selecting tires.

    The manufacturer's recommendations for tire pressure should also be followed. Either over- or under-inflating tires:

  • reduces traction, increases the likelihood of skidding, and degrades the handling characteristics of a vehicle
  • leads to rapid tire wear
  • Failing to keep wheels balanced and the suspension system properly aligned can lead to extremely rapid tire wear and may result in a blow-out.

    Worn components in the suspension and steering systems of your vehicle can cause you to lose control of your vehicle as well as cause rapid tire wear.

    The purpose of rotating tires is to prolong the life of the tire. Rotation should be done according to the intervals and procedures recommended by the manufacturer of your vehicle.

    Peeling out or spinning your tires on fast starts:

  • creates poor acceleration
  • causes excessive tire wear
  • can lead to a citation for "exhibition of speed"
  • wastes fuel. Cornering at high speeds is dangerous and also causes excessive tire wear

  • Lesson Summary


      

    Lesson 7 Quiz


    You will now answer 5 questions to test what you learned during this lesson. You must answer all questions correctly to receive completion credit for this lesson. You may answer the questions as many times as necessary to get them right.

    You should review the lesson material if you don't do well on the quiz.

    1. The engine in your car is sometimes called:


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    2. The minimum tread thickness for passenger car tires is:


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    3. Disc brakes work by:


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    4. The ALTERNATOR:


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    5. This oil warning light means that:


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