Shimano SORA ST-3500 3503 2x 3x 9-Speed Left/Right STI Shift/Brake Levers
YES, the front shifter may be used with either 2x or 3x cranks. Adjust your front derailleur limit screws correctly and it will work.
YES, the front shifter may be used with either 2x or 3x cranks. Adjust your front derailleur limit screws correctly and it will work.