I want to change to a 165 mm crank length on the drive side of my Dura Ace Octaplus FC7703 triple chain set. Can I use a drive side Dura Ace Octalink FC7710 track crank to do this? Are the two crank sets compatible? Thanks
It looks like the FC7710 chainrings are 144mm BCD (from ebay chainring Y16S45001 listing) while the FC7703 has BCD 133mm (from ebay listing https://www.ebay.com/c/15025379322 ) Thus, OP could NOT replace his drive side FC7703 crankarm with a FC7710 165mm crankarm and transfer the chainrings over.