sugino RD (or GD) i think use the bmx 140mm?? BCD, so it's cool if you want to run 44T or 42T chainrings. but harder to find things 46T and very hard for 48T
sugino 75's are the top end light weight purpose built track crankset, which are good as dura-ace and campy, but not as expensive (still expensive though, especially for colours)
sugino RD (or GD) i think use the bmx 140mm?? BCD, so it's cool if you want to run 44T or 42T chainrings. but harder to find things 46T and very hard for 48T
sugino 75's are the top end light weight purpose built track crankset, which are good as dura-ace and campy, but not as expensive (still expensive though, especially for colours)