Thread: Changing Chainrings
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Old 04-28-13 | 09:07 AM
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Frankfast
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From: New York and San Juan

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Originally Posted by HillRider
If you have a standard Campy Record crank with 53T/39T chainrings, the bolt circle diameter is 135 mm and 39T is the smallest chainring it will accept. To get compact gearing (normally 50T/34T) you will have to replace the entire crank with one that has a 110 mm BCD. Campy does offer them.
Thanks, that's what I needed to know.
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