21 speed shifting system mountain bike for adult men and women; Alumimum alloy frame;The double disc brake system improves braking efficiency and safety;The quick release lever makes it easy and convenient to disassemble and assemble the front wheel;As it is big item during transportation, the bike arrives with 85% assembled, You need to install the front wheel, handlebar, pedals, seat and air up the tires.Easy assembly.The required assembly instruction and tools are included in the packageBikes are guaranteed. Feel free to let us know if you have any problems ,we will do our best to help you;Suitable for riders between 5’10
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