《明史·志·卷四十一》
每个车轮有辐条十八根，车轮外框都涂红漆，抹金的用铜刻镂出的花纹叶片装钉。
每轮辐十有八，其辋皆红髹，抹金铜鈒花叶片装钉。
Each wheel has eighteen spokes. The outer frame of the wheel is painted with red lacquer, and the gold-painted flower pattern leaves are studded with copper engravings.