On fitting 700C rims to a hub rated for up to 20"

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I am currently in the planning stages of creating a really fancy front fork for my bike.
For a little background, I want to try to get this:
https://bikefix.co.uk/blade
And attach a dynamo hub to it.
The thing is that I have so far been only able to find the Schmidt SON XS-M series of hubs which seems remotely correct, and all of them are listed as max 20" rims, while I want 700C rims.



My question is this: What would happen if I tried to fit the larger rims to the smaller hub, and why shouldn't I do it?






wheels fork dynamo-hub







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    up vote
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    down vote

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    I am currently in the planning stages of creating a really fancy front fork for my bike.
    For a little background, I want to try to get this:
    https://bikefix.co.uk/blade
    And attach a dynamo hub to it.
    The thing is that I have so far been only able to find the Schmidt SON XS-M series of hubs which seems remotely correct, and all of them are listed as max 20" rims, while I want 700C rims.



    My question is this: What would happen if I tried to fit the larger rims to the smaller hub, and why shouldn't I do it?






    wheels fork dynamo-hub







    share|improve this question







    New contributor




    user40052 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I am currently in the planning stages of creating a really fancy front fork for my bike.
      For a little background, I want to try to get this:
      https://bikefix.co.uk/blade
      And attach a dynamo hub to it.
      The thing is that I have so far been only able to find the Schmidt SON XS-M series of hubs which seems remotely correct, and all of them are listed as max 20" rims, while I want 700C rims.



      My question is this: What would happen if I tried to fit the larger rims to the smaller hub, and why shouldn't I do it?






      wheels fork dynamo-hub







      share|improve this question







      New contributor




      user40052 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I am currently in the planning stages of creating a really fancy front fork for my bike.
      For a little background, I want to try to get this:
      https://bikefix.co.uk/blade
      And attach a dynamo hub to it.
      The thing is that I have so far been only able to find the Schmidt SON XS-M series of hubs which seems remotely correct, and all of them are listed as max 20" rims, while I want 700C rims.



      My question is this: What would happen if I tried to fit the larger rims to the smaller hub, and why shouldn't I do it?






      wheels fork dynamo-hub




      wheels fork dynamo-hub






      share|improve this question







      New contributor




      user40052 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      user40052 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









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          Generator hubs for small wheels will output less and produce less drag at a given speed when built to a 700, because they'll be operating at fewer RPMs than expected.



          AFAIK all the non-sondelux Schmidts still have output suitable for halogen, including XS-M. You should double check when you order the hub. If so it will pair fine with LED in a larger wheel.






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            up vote
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            Generator hubs for small wheels will output less and produce less drag at a given speed when built to a 700, because they'll be operating at fewer RPMs than expected.



            AFAIK all the non-sondelux Schmidts still have output suitable for halogen, including XS-M. You should double check when you order the hub. If so it will pair fine with LED in a larger wheel.






            share|improve this answer
























              up vote
              3
              down vote













              Generator hubs for small wheels will output less and produce less drag at a given speed when built to a 700, because they'll be operating at fewer RPMs than expected.



              AFAIK all the non-sondelux Schmidts still have output suitable for halogen, including XS-M. You should double check when you order the hub. If so it will pair fine with LED in a larger wheel.






              share|improve this answer






















                up vote
                3
                down vote










                up vote
                3
                down vote









                Generator hubs for small wheels will output less and produce less drag at a given speed when built to a 700, because they'll be operating at fewer RPMs than expected.



                AFAIK all the non-sondelux Schmidts still have output suitable for halogen, including XS-M. You should double check when you order the hub. If so it will pair fine with LED in a larger wheel.






                share|improve this answer












                Generator hubs for small wheels will output less and produce less drag at a given speed when built to a 700, because they'll be operating at fewer RPMs than expected.



                AFAIK all the non-sondelux Schmidts still have output suitable for halogen, including XS-M. You should double check when you order the hub. If so it will pair fine with LED in a larger wheel.







                share|improve this answer












                share|improve this answer



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                answered 4 hours ago









                Nathan Knutson

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