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Moment of inertia of a wheel

  1. Sep 9, 2014 #1
    A small confusion ! Why is most of the mass of the wheel concentrated on the rim ? I know that it is to increase the moment of inertia , but what is the practical use of doing so ?
    Thanks in advance !
  2. jcsd
  3. Sep 9, 2014 #2


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    I'm afraid you'll have to be a little more specific here. What type of wheel are we talking about?
  4. Sep 9, 2014 #3
    A normal vehicle ( car , bike ) wheel where mass is mostly concentrated on the outer edge ( outer rim ) . I guess the word rim suits here . I mean the outer curved circular thingy !
  5. Sep 9, 2014 #4


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    To support the tire. Try mounting a bicycle tire on spokes..impossible.

    No. that is an unwanted consequence. A high MoI means greater power is required for acceleration.

    overall wheel weight has other negative consequences as it increases un-sprung mass.


    So generally you want to minimize the wheels weight and MoI.
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