older children‘s bicycle boy 6-12-15 years old junior high school student girl variable speed mountain bike super light

starry silver (variable speed strip wheel) gift bag(星空银（变速条轮）礼包) knight black (variable speed strip wheel) gift bag(骑士黑（变速条轮）礼包) pink blue (variable speed strip wheel) gift bag(粉蓝色（变速条轮）礼包) starry silver (single speed bar wheel) gift bag(星空银（单速条轮）礼包) knight black (single speed bar wheel) gift bag(骑士黑（单速条轮）礼包) pink blue (single speed bar wheel) gift bag(粉蓝色（单速条轮）礼包) starry silver ((variable speed integrated wheel) gift bag(星空银（（变速一体轮） 礼包) knight black (variable speed integrated wheel) gift bag(骑士黑（变速一体轮） 礼包) pink blue (variable speed integrated wheel) gift bag(粉蓝色（变速一体轮） 礼包)

18 inches (suitable for height 115-135cm)(18寸（适合身高115-135厘米）) 20 inches (suitable for height 128-145cm)(20寸（适合身高128-145厘米）) 22 inches (suitable for height 140-160cm)(22寸（适合身高140-160厘米）)