Denver auto parts maker Gates Corporation offers belt-driven systems for biking that require no lubrication, so there is no need for cyclists to worry about whether the metal oily chains on traditional bicycles have soiled their pants or skirts.
丹佛汽车零部件生产商盖茨公司日前针对自行车推出了一种无需上油的皮带传动系统，所以骑车者们不必再担心传统自行车上了油的金属链条是否会弄脏自己的裤子或者裙子。
资料图：皮带由聚氨酯材料制成
The belts, made of polyurethane and shot through with carbon cords to give them tensile strength, are more expensive than chains and can be installed only on frames adapted to their use.
据悉，该皮带由聚氨酯材料制成，嵌有碳绳以使其富有张力，价格高于金属车链，只能安装在经过改装的车架上。