I want to replace the old to small for me 170's cranks on my old Grandis circa 1982. How can I tell what type of BB it is? I have a great older dura ace crank I want to put on but not sure if it will fit on the current BB and then if not what thread do I need?
I am plannning to get 28mm tires and go gravel grinding.....huge amount of tire space.
