Originally Posted by
Ironfish653
They either mount like a 4th chainring, or in place of the existing big ring.
Ah, okay! Thank you for that clarification.
So, from what I gather, this essentially means that the "BCD" I originally posted is incorrect, and the actual measurement I should be taking for the BCD should be the bolts that are holding all three of my gears together. I've attached a photo of the new BCD measurement; is the manner in which I have measured the real BCD of my MTB correct?
