Mountain Bike SL-TX30 Thumb Gear Shifter 3x7 Speed Shift Lever Set for Shimano
For Shimano SL-TX30 Thumb Gear Shifter 21(3x7) Speed MTB Mountain Bike Shift Set. 3x7 Speed Shifter Set. Right shifter is a trigger-type 6 or 7speed shifter with one lever for down-shifts and a thumb button for up-shifts.