Compatible for: Front 3 gear, Rear 7 flywheel and 21 speed positioning transmission system
Scope of application: 21-23mm diameter handle bar
21-speed transmission, ergonomic design of position and trigger handle.
Make wider gear display vision, just take a glance at speed changes. 3x7 shifter brake combo bicycle 3x7 shifter bike gear shifter
Package includes: 2pcs Transmission (Left 3 speed / right 7 speed), 2pcs Brake line. 21 speed shifter set 3x7 lever bicycle shifters 3x7 cambios para bicicleta tb one bike shifter bike trigger shifter 7 speed mtb bicycle brake lever combo
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