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Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

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Old 07-22-11, 01:06 PM   #1
hammer11
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Deraileur tab position

From center of BB. Where should this be for standard road position? Anyone got one they can measure?

Thanks in advance!
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Old 07-22-11, 02:11 PM   #2
unterhausen
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i don't think we usually call it a derailleur tab. What is it that the derailleur tab does?

Are you talking about the front derailleur bracket braze-on? If so, that's a little tricky, and you have to decide what range of chainrings you are going to accommodate. Shimano and Campagnolo both have technical drawings for their front derailleurs
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Old 07-22-11, 03:33 PM   #3
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I often call it a derailleur tab.

Take a look at the published spec, as well as the dimensions of your particular braze on and balance those with the gearing range for the crank sets you hope to use.
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Old 07-22-11, 03:46 PM   #4
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depends on if you want to use both a 53 or a 50 (144 looks good), or if you think you will only ever use a 53 (146mm will center with a 53). These are shimano numbers. Campagnolo is a bit different.
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Old 07-22-11, 03:55 PM   #5
e-RICHIE
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for a typical outside ring of 53t the center to center measurement is 148mm-150mm.
it also depends on the changer you are using atmo.
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Old 07-22-11, 03:58 PM   #6
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Many Shimano specs and tons of good info from Peter Verdone here:
http://pvdwiki.com/index.php?title=S...mebuilder_Info
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Old 07-22-11, 04:00 PM   #7
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Perfect thanks.
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