The tire tread filled with silica had low rolling resistance and other advantages. But silica was difficult to disperse in rubber compound during mixing.

以白炭黑作填充剂的轮胎具有滚动阻力低等优点，但是白炭黑在橡胶中不易分散。

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The helically would layer(s) ( 22 ) are disposed over the outermost L ply ( 23 ) and have a width substantially 100% of the footprint width of the tire tread.

螺旋缠绕层（22）放置于最外侧L帘布层（23）上方并且其 宽度基本上为轮胎胎面的接地印痕宽度的100％。

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Service the radiator and maintain antifreeze level; check tire tread or, if necessary, replace tires with all-weather or snow tires

检修散热器并且保持在防冻的水平。 检查轮胎的胎面并且在必要时将其更换成全天候的耐风雪的轮胎。

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For comparison, two tire manufacturers might dispute whether their tread patterns infringe one another, but neither would claim to own the shape of the wheel.

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