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  1. #1
    Join Date
    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,

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

  2. #2
    Senior Member
    Join Date
    Aug 2005
    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!
    20 Post(s)
    0 Thread(s)
    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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