The BCD is irrelevant, as that's determined by the P2M spider and not the crank. You can't fit a 24mm spider to a 30mm crank, or vice versa, but I don't if the newer Rotor cranks have the same splines for the spider as the older ones. I suspect not, but I imagine P2M would be able to tell you.
The BCD is irrelevant, as that's determined by the P2M spider and not the crank. You can't fit a 24mm spider to a 30mm crank, or vice versa, but I don't if the newer Rotor cranks have the same splines for the spider as the older ones. I suspect not, but I imagine P2M would be able to tell you.