measuring bcd

[john]

any ideas how to do this? without having a crank to try it on?

 

[lelobysfoot]

bcd

Arm yourself with a good steel rule and try this:

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

 

[john]

Re: bcd

Arm yourself with a good steel rule and try this:

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

thanks!