So, I set out to find some new tires that would be softer and also have a tread pattern that would work reasonably well on dirt or paved surfaces.

于是，我开始寻找一些新的轮胎，这将是更柔软，还具有将工作相当好有污点或铺设路面的胎面花纹。

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From somewhere in Belgium the convoy had bumped along pot-holed dirt roads and some paved ones also in bad shape, hour after hour with frequent delays.

NPR: Kate Nolan, WWII Combat Nurse

But it also had some non-original parts, including Model A cranks and rods, an overhead valve unit built for 1920s dirt-track racing and dual carburetors from the 1930s.

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