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?
I was thinking you were going outside of 50/34 or 53/39 up front, and 11-23 through 11-28 in back. That is the current Shimano status quo.
If you want finer granularity in tooth ratios than is currently possible, you're talking about changing chain link lengths to get in between current ratios. If you're talking about going outside of 16 teeth front and 17 teeth rear ranges, you're talking about derailleur dimensions, cages, frame clearances for larger rings, etc. If you're talking about the potential of adding more cogs, then you're after hub spacing or chain widths.
Seems my definition of "status quo" is more imaginative than yours.