40 Tooth Chainrings with Shift Pins - Continued...

Discussion in 'Cycling Equipment' started by Grenouil, Feb 27, 2003.

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  1. Grenouil

    Grenouil Guest

    I posted previously asking about availability of 40 tooth middle chainrings with ramps and pins for
    improved shifting, and got some useful inputs - SpecialitiƩs TA is one option - Stronglight also
    have a range of rings with 'Chain Shifting Assistance' (aka CSA)

    Occurs to me that it should be possible to take a 'flat' chainring and add shifter 'pins' by
    drilling and tapping holes into which small round headed bolts could be screwed, (or even just
    drilling and putting in pop rivets). The position for the pins (four?) would be determined from
    measurement of a ramped and pinned ring. This could be done on both the middle and the outer rings


    Has anyone tried this?

    Would it make enough difference to the shifting to be worth the effort?.....

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