Dure-Ace BCD?

Posted on Tue 28th, August 2007

• #1

Object

Does anyone on here know the BCD of Dura Ace Track Cranks?
• #2

runcible_rakan

http://www.google.co.uk/search?q=dura+ace+bcd+track+cranks&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a
• #3

Hovis_Brown

144
• #4

Object

Sorry that was pure laziness on my part.
Thank you for answering instead of telling me to #'!*$£ Off
• #5

pip

And just for completeness. Sheldon Brown (who else) has a great chart for looking up BCD from a simple measurement. So if you want to check any cranks BCD, here you go:

http://www.sheldonbrown.com/gloss_bo-z.html

144BCD is pretty much the standard for track gear. Its only the really old stuff and lower-end stuff that deviates from this.
• #6

Hovis_Brown

this is also a great link for all things track:

http://www.businesscycles.com/tr-refspec.htm
• #7

Momentum

The fluted DA cranks (part of the group til the 80s) are 151bcd, anything later than that is 144. If you want to make absolutely sure then measure two adjacent crank bolt holes and multiply by 1.7 (as Sheldon says in the page linked by pip).

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