Shimano tourney rs45 7 speed rear shiftershimanos tourney rs45 shifter offers effortless grip shift operation for 7 speed drivetrains compatible with all shimano 7 speed rear derailleurs it features shimanos revoshift technology so you can quickly click to the exact gear you want without having to gradually shift through each individually features compatible with all shimano 7 speed rear derailleurs grip shift operation optical displaya 2 year warranty is offered with all shimano produc