Originally Posted by
WhyFi
Really? I have spell it out for you? I'm talking about combinations different from the common 53/39 up front and 12, 13, 14, 15, 16, 17, 19, 21, 23, 25 on the cassette. How is changing the number of teeth on a cog reinventing the wheel?
Presuming that the endpoints 39-25 and 53-12 are acceptable there aren't that many options available for a 10 or 11 speed drivetrain. Can you be more specific what you are thinking of?