子供の自転車 are one of the main categories of children's 自転車. Children's 自転車 include four categories: children's 自転車, strollers, baby walkers, and children's tricycles. When buying a 自転車, consider the age and height of the child, and choose the appropriate size, that is, a 自転車サドルの高さは435〜635mmの範囲です。車両を購入するときは、ハンドブレーキのサイズに注意してください。サイズが大きすぎると、子供はブレーキをかけるときにハンドブレーキをしっかりと握ることができず、車を止めることができません。だから、買い物をするときは子供たちに試してもらうのが一番です。また、制動力は50N以上でなければならない。そうしないと、車両が停止できず、子供に危害を及ぼす可能性があります。子供の自転車 are also equipped with protective wheels (balance wheels), which can keep the rider in balance, so pay attention to whether they are equipped (one on each side) when purchasing. It is necessary to consider this. The chain cover of children’s 自転車 is indispensable. Children’s 自転車 with a saddle height equal to or greater than 560mm should be equipped with a chain cover or other protective device to cover the outer surface of the chain and the meshing part of the sprocket. When meshing on the sprocket, the chain cover should extend beyond the outer side of the chain in the diameter direction. If the chain cover is not used but other protective devices are used, the covering range should be extended to the point where the sprocket initially enters the two sides of the chain. Measure at least 25mm along the chain.