Originally Posted by
JohnDThompson
The original (early 70s) Dura-Ace track cranks used a 130mm BCD; later models (late 70s until ~85) used a 151mm BCD. I don't think any used a 144mm BCD -- that was for Campy & clones (although 60s and earlier Campy cranks used 151mmBCD as well -- go figure).
dunno about the 130mm da track cranks.... unless u are talking about 10-pitch
dura ace 7600 cranks are 144bcd. also da 7710 octalink (present) are 144bcd.