How do you measure BCD's?
07-22-12, 11:58 AM
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How do you measure BCD's?
I have so many chainrings i need to get rid of, and many of you need the right BCD's. How do you measure them correctly?
07-22-12, 12:01 PM
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07-22-12, 12:05 PM
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I use a Specialties TA packaging carton, it has a BCD schema on the back, very easy. Just overlay the ring.
Sheldon has a good list: https://sheldonbrown.com/cribsheet-bcd.html measure the distance between two holes center-to-center. You need to be precise as a few mm makes a different BCD.
Sheldon has a good list: https://sheldonbrown.com/cribsheet-bcd.html measure the distance between two holes center-to-center. You need to be precise as a few mm makes a different BCD.
07-22-12, 12:39 PM
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you beat me to it, mikemowbz!
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