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Help with BCD choice

630 Views 4 Replies 4 Participants Last post by  miwuksurfer
Hello everyone

I'm building a SS and will be using the Ligntning carbon crankset. I have a choice of 94 or 104 BCD - which one would you chose? What will give the widest selection of chainrings from various manufacturers?

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104bcd is more common but 94bcd has better chainring support (5 arm instead of 4) and can run down to a 29t versus the 104 that can only do 32t with ease. Possibly fewer if you buy some niche rings.

So I would always do 94 if I have a choice.
94 bcd, if you want to run 32T chainring.
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