Alivio FD-M3120-D Front Derailleur - 2x9-Speed Side Swing Front Pull Direct Mount 36t Max

The Shimano Alivio FD - M3120 Front Derailleur is a great choice for your bike. It uses side - swing action, which not only makes cable routing easier but also ensures smooth operation. This derailleur is designed for 2x9 drivetrains. It works well with a chainstay angle between 64 - 69 degrees and a chainline of 48.8mm/51.8mm. It's a double - type derailleur, compatible with Shimano Mountain shifters. With a side - swing style, front - pull cable, high direct - mount clamp, and 9 drivetrain speeds, and a maximum ring of 36 teeth, it offers reliable performance for your cycling needs.

Using the Shimano Alivio FD - M3120 Front Derailleur is quite straightforward. First, make sure it's properly installed on your bike according to the given chainstay angle and chainline specifications. When shifting gears, just operate the Shimano Mountain shifter as you normally would, and the derailleur will smoothly move the chain between the gears. As for maintenance, regularly clean the derailleur to remove dirt and grime. You can use a mild cleaner and a soft brush. Also, check the cable regularly to ensure it's not frayed or loose. If you notice any issues with the shifting performance, it might be time to adjust the derailleur. And remember, this derailleur is designed for 2x9 drivetrains, so don't try to use it with other setups.