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  1. #1
    Senior Member cnnrmccloskey's Avatar
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    May 2009
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    '82 Giante super challange, 70 Gitane Tour de France, GT Gutterball
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    Truvativ Crankset

    I recently picked up a cheapo used truvativ firex crankset and I discovered two problems
    1. When I first went to put the crankset on my old bike with a tange BB from ~82 it doesn't sink on far enough theres maybe one thread sticking out. New Spindle? this is the first time I've ever tried putting a newer crank on an older bike but I've never seen a mismatch resulting in that.
    2. The inner and outer chainrings sit at a slightly different point (same BCD but where the bottom sits on the spider is different) Should I just give up on this crankset or is it even worth it to try to grind down the chain ring to fit.
    I'm building this bike for looks not performance and the only reason I'm at all attached to this crankset is that it looks real good on this setup.

  2. #2
    cab horn
    Join Date
    Jun 2004
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    Toronto
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    1987 Bianchi Campione
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    Quote Originally Posted by cnnrmccloskey View Post
    I recently picked up a cheapo used truvativ firex crankset and I discovered two problems
    1. When I first went to put the crankset on my old bike with a tange BB from ~82 it doesn't sink on far enough theres maybe one thread sticking out. New Spindle? this is the first time I've ever tried putting a newer crank on an older bike but I've never seen a mismatch resulting in that.
    2. The inner and outer chainrings sit at a slightly different point (same BCD but where the bottom sits on the spider is different) Should I just give up on this crankset or is it even worth it to try to grind down the chain ring to fit.
    I'm building this bike for looks not performance and the only reason I'm at all attached to this crankset is that it looks real good on this setup.
    1) You're just lucky that you never had compatability problems. Each crankset specs their own type/length bb for the correct chainline.
    2) No idea what you're talking about. Post a picture illustrating the issue
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  3. #3
    Senior Member cnnrmccloskey's Avatar
    Join Date
    May 2009
    Location
    Portland Oregon
    My Bikes
    '82 Giante super challange, 70 Gitane Tour de France, GT Gutterball
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    Yes, i suspected that old bikes have treated me extreamly well until recently.
    I have no camera so I have demonstrated via paint

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