儿童自行车为何国际标准是12、16、20寸，而14和18寸只有国内才有呢？ - 知乎
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12寸:适合年龄3-5岁，身高98-112CM 14寸:适合年龄4-6岁，身高105-117CM 16寸/18寸:适合年龄5-7岁，身高112-127CM 20寸:适合年龄6-9岁，身高117-136CM 快速学会自行车的技巧 推车练习:将自行车辅助轮与踏步拆除，让孩子站在车身左边，练习推着自行车走路前进、转弯、刹车，反复的练习直到动作熟练。 滑行练习 ...
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