microSHIFT Estes Thumb Tap Shifter - Left, Triple, Optical Gear Indicator, BlackWith a solid lever throw and crisp engagement, responsive shifting is just a click away. microSHIFT Estes left thumb tap shifters are designed with a precision and durability not usually seen in entry level shifters. And the fact that theyre compatible with standard Shimano front derailleurs makes them an easy path to upgrade. Product Specifics Double or Triple: Triple Drivetrain Speeds: 7 Drivetrain Speeds: 8 Drivetrain Speeds: 9 Front Der Shifter