Shimano Alivio SL-M3100-2L Shifter - Left 2-Speed RapidFire Plus MFPN=01337-06 Short and compact ergonomic saddle

Short and compact ergonomic saddle shape complements modern road bike geometry

Provides predictable traction and cornering on street and park

Shimano derailleurs require a longer B-tension screw (use WQ-2299)

Named for the “old school” trick the CST Decade was designed with flatland BMX riding in mind

Shimano Alivio SL-M3100-2L Shifter - Left 2-Speed RapidFire Plus MFPN=01337-06 Short and compact ergonomic saddleThe Shimano Alivio SL M3100 Left Shifter provides responsive rear shifting for 9 speed mountain bike drivetrains. Double or Triple Double Drivetrain Speeds 9 Front Der Shifter Compatibility Shimano Mountain Shifter Style Trigger Speed 2 Speed