Originally Posted by
grumpus
The shifter doesn't tell the derailleur how far to move, it just pulls a certain amount of cable for each click. The derailleur decides how that cable pull will translate to lateral motion. Older SRAM 1:1 stuff pulls more cable than the equivalent Shimano, so minor changes in cable tension/position have less effect on shifting accuracy.
Ah, I see now, a different ratio of movement from the shifter to the RD. Thank you. So I SHOULD be able to use the Shimano cassette with a SRAM shifter and SRAM RD?