mountain bike bicycle variable speed shock absorption double disc brake bicycle student adult and children male and female authentic off-road vehicle racing

7-speed black and red gift bag 7-speed black and blue gift bag 7-speed white and blue gift bag 21-speed black and red gift bag 21-speed black and blue gift bag 21-speed white and blue gift bag 24-speed black and red gift bag 24-speed black and blue gift bag 24-speed white and blue gift bag

20 inches (suitable for 120-140 height) 24 inches (suitable for 145-165 height) 22 inches (suitable for 135-155 height) 26 inches (suitable for 160-185 height)