For each of the tasks assume that the same spoked wheel will always be used on the front but there is a choice of wheels for the rear.

对于每项任务都假定，同样的辐条车轮将总是装在前面，而装在后面的车轮是可以选择的。

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The two basic types of wheels are those constructed using wire spokes and those constructed of a solid disk (see Figure 1) The spoked wheels are lighter, but the solid wheels are more aerodynamic.

两种基本的车轮类型是分别用金属辐条和实体圆盘组装而成（见图1）。辐条车轮较轻，但实体车轮更符合空气动力学原理。

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It was an open cart with two wooden-spoked, iron-rimmed wheels, not the old automobile tires that you used to see on a common utility wagon.

NPR: Excerpt: 'World Made By Hand'