Question: are sram shifters compatible with shimano derailleurs?
Answer: The SRAM rear derailleur (mech) will not work with a Shimano shifter as is; the cable pull and shift activation ratios are not the same between the two systems. ... If you have an 11-36 (mid-cage SRAM RD) or a 10-42 (long-cage SRAM RD) cassette, you won't be able to use a Shimano road rear mech.