Originally Posted by
alcjphil
Your shifters have to be compatible with your derailleurs. If you have Shimano derailleurs, you need Shimano compatible shifters. If your derailleurs were made by SRAM, you need SRAM shifters
Mostly but not entirely true as SRAM Attack series shifters are Shimano compatible. SRAM also makes Shimano compatible derailers. Triple FD/shifters are evaporating though. Quality wise
SRAM and Shimano are similar, but both have a wide range of selection, some of which perform better.