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  1. #1
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    Replacing Crankset

    HI,
    I'm looking to replace a 28/38/48 crankset with a 22/32/42. My front derailleur is top mounted, clamped to the seatpost, bottom swing, top pull. Since the tooth differential between the smallest and largest chainwheel is the same, could I assume that the FD would still work, but that I would need to unclamp it and slide it down (and possibly install a longer cable)? I'm sticking with the same brand (Altus). The current one is approx 1993 year model.
    Thanks,
    Jon

  2. #2
    Senior Member GordoTrek's Avatar
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    yes, outside of installing a new cable you should be fine, be prepared to readjust the fd though
    My Bikes- http://imgur.com/a/WHSUo "You should ride a bicycle for twenty minutes every day, unless you're too busy; then you should ride for an hour"

  3. #3
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    Oh, and maybe take a link or two out of the chain?

  4. #4
    Senior Member Bill Kapaun's Avatar
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    The FDER cages for the smaller ringed cranksets have a smaller radius, but your FDER should still work OK.
    It just might not shift quite as well as before.

  5. #5
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    Quote Originally Posted by byrd48 View Post
    Oh, and maybe take a link or two out of the chain?
    Yes, but don't just remove some links. Size the chain per the usual methods and gently shift into the big-big combo on the bench to ensure that the chain is long enough before riding the bike. I like this method: http://sheldonbrown.com/derailer-adjustment.html#chain

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