Shimano Deore M580 9 Speed Trigger Shifter - Including Gear CableShimano Deore M580 9 Speed Trigger Shifter Including Gear Cable A lightweight and reliable road bike shifter which provides superb lever force across all 9 sprockets. Featuring a renowned 2 way release design, this model allows shifting from various riding positions for fast and easy gearing. Additionally, its upper lever still performs the same shift functions but it can now also swing in either direction, allowing it to be released by your thumb or