This has enabled designers to continue with the trend of reducing the steering wheel size, with the typical item now being about half the diameter of that of a normal road car.

这也使得设计师可以进一步延续减少方向盘尺寸的趋势，目前标准的赛车方向盘直径只有普通道路车辆方向盘的一半大小。

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The large diameter super wide quality rubber wheel makes the user's ground effectively protected, and increases the friction of the brake.

大直径超宽优质橡胶车轮使得用户地面得到有效保护的同时，增大了制动的摩擦力。

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SHOULDER: Defect found on rib or outer diameter; a raised edge on rib face caused by grinding wheel; raised surface at either end of outer diameter raceway.

挡肩：外径或挡肩上发现的缺陷；挡肩上由于磨床砂轮所造成的突起；在外径滚道两端的突起。

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Instead of its standard position behind the movement in back of the watch, the 14mm-diameter wheel floats above the movement and dials, encased under the domed crystal on its face.

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The saucer section would be a 0.3-mile-diameter (536-meter-diameter) rotating, magnetically suspended gravity wheel that would create 1G of gravity.

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