This is a cool crank. The velobase entry says nothing about the BCD for the inner ring. Hopefully it is something useful like an 86 bcd. I have a stronglight triple which is 144/86 bcd. The velobase entry is also just a little off. It says that the rarity is "average" and the quality is just a little above average. Granted that is based on one user but this crank is rare and looks to be very good quality.