BSTSEL 26-inch Bike, 21-speed Shifting Bicycle Double Disc
BSTSEL 26-inch Bike, 21-speed Shifting Bicycle Double Disc Brake System Flat Colorful Spoke 3*7 shifter,front derallieurans rear deralieur make the gearshift sensitive.Derailleur with 21 Speed provide precise and quick shifting.A wide range of gears...