Are headset baseplates interchangeable? Straight 1 1/8 tube with external cups, the only contact is with the inside of the bearing cartridge which is just one of two sizes no?
not quite. there are two different angles (35 and 45 degree) but the inner diameter of the bearing can differ. Particularly annoying is CK headsets where only their crown races work. You could get lucky but equally you might not.
Are headset baseplates interchangeable? Straight 1 1/8 tube with external cups, the only contact is with the inside of the bearing cartridge which is just one of two sizes no?