User:Keithonearth/Sandbox

Circumstantial
Not all Shimano systems (with the same number of gears are compatible), namely Dura-Ace is not compatable with non-Dura-Ace

"SRAM actively promotes their 1:1 shifters and derailleurs, which have about twice as much cable movement as those by other manufactures."

Diagram of a rear suntour rear derailleur showing the indexing system clearly shows the shift positions getting further apart as they get farther from the top gear.

Hard
???