Bicycle front chainring mounting standards – according to the number of mounting bolts and diameter of the circle they are spaced along.
Updated: 15/03/2020. This post addresses bicycle crankset compatibility in terms of mixing various speed cranksets with other components. For example: an 8 speed crankset on a bicycle with 10 rear sprockets and a 10 speed chain (a), or a triple chainring with a front derailleur (FD) constructed for double chainrings (b). It will also address … Read more Compatibility  Cranks(ets)