Hello, i recently broke the chain on bike. it was a 9 speed chain. the drivetrain system that i have is a Shimano Alivio. i did some research, and found the Sram PC-991. The one i want to buy is the SRAM PC-991 Cross Step Chain with PowerLink Gold 9-speed. The only thing that is stopping me is that i do not know if it is compatible with my drivetrain, please help.