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  1. #1
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    Mar 2011
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    Front derailleur questions...

    So the refurbed, minty '84 Trek 420 lasted me 5 fun days before something broke... the Simplex front derailleur.

    So far all I know is I need a 28.6mm, double chain, bottom pull replacement. Is there anything else I need to know before I buy one?

    Are there any tricky parts to installing, such as knowing how tight to have the cable, etc?

    Grounded in Georgia,

    Gary
    Last edited by BrazAd; 04-15-11 at 09:02 PM.

  2. #2
    Senior Member
    Join Date
    Aug 2005
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    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    I had an '83 400 set up as my rain bike and it was a great frame but a broken Simplex derailleur isn't much of a surprise.

    Assuming you have friction front shifting (downtube or bar end shifters) you can use nearly ANY road front derailleur with the proper clamp diameter or get a braze-on model with a 28.6 mm adapter clamp. Road front derailleurs are universally bottom pull and friction shifting lets you trim anything to run smoothly.

    I'm currently running a Shimano 105 10-speed front derailleur on a bike with an 8-speed cassette and a 7/8-speed chain. Since it has friction shifters it works wonderfully.

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