children's bicycle 6-12 years old youth student 20-inch children mountain bike wholesale shock absorption boy teen bicycle

green and red ordinary style bluish green ordinary style purple yellow ordinary style blue and red shock absorber bluish green shock absorber purple yellow shock absorber

18-inch single speed (suitable for height 120-135cm) 20-inch single speed (suitable for height 130-145cm) 22-inch single speed (suitable for height 140-155cm)