compat of 10-sp chainrings on 9-sp drivetrain?

Discussion in 'Cycling Equipment' started by ThrillBilly, Oct 12, 2005.

  1. ThrillBilly

    ThrillBilly New Member

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    im ready to get a new compact crank.
    the FSA's come in either shimaNO 9 or 10 versions. (or campy)

    im running shim 9-sp now, but plan to UG to shim 10-sp later.

    SO, can i run the narrow width 10-sp chainrings on
    my existing 9-sp drivetrain without any problems ???

    UNTIL i UG to the 10-sp DT at a later date.

    BTW, im NOT upgrading to 10-sp just for 1 extra gear,
    i will be moving the exist 9-sp DT to another frame later.

    thanks in advance for ANY helpful insight.
     
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  2. John M

    John M New Member

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    The width of the teeth on 10s and 9s are the same so the answer to your question is yes, it should work. The 10s chainrings differ in the ramps/pins that they have to better enable pick-up of the narrower 10s chains. If I recall correctly, on Campy brand 10s cranksets, the rings are 0.4mm closer to each other to improve shifting of the chain onto the large chainring. All of the chains have a 3/32" inner pitch but differ in their outer width.
     
  3. el Ingles

    el Ingles New Member

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    bike shop guy I asked says yes , no problem .
     
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