JIS D 9420:2018规定了主要用于通用自行车、幼儿自行车和JIS D 9111中规定的电动助力自行车的辐条和乳头的要求。
JIS D 9420:2018 specifies requirements for the spokes and nipples to be used mainly for bicycles for general use, bicycles for young children, and electric power assisted cycles specified in JIS D 9111.