Shifter 3x7 Speed Shifter Brake Lever Combo 21 Speed Shifter Set and Brake Levers with Inner Cables for MTB Bicycle Mountain Bike by KAKO
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21 Speed Shifter Set with 3 x 7 Speed Shifters and Brake Levers.
The left side has a 3 speed, and the right side has a 7 speed.
Using this bicycle shifter you will be able to set up the following Front 3 gear, Rear 7 flywheel, and 21 speed positioning transmission. The handle bar diameter should be between 21mm and 23mm.
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