关于轮胎的小知识 你知道多少
接下来带你了解,那些关于轮胎的隐藏小标识
品牌logo
轮胎上最显眼的一串英文字母,就是轮胎的品牌标志了,下面是几个常见的轮胎品牌,看看你的轮胎是哪一种
每个轮胎上都有一串数字和字母组合的标识,接下来为你解读它分别代表了什么。
以下图225/45 R18 91W为例
宽度
“225”指的是轮胎断面的宽度是两个胎侧之间的宽度,以毫米为单位,轮胎的宽度决定了它的抓地力效果,同品牌同型号的轮胎胎面越宽,操控和制动力的效果就越好。一般来说微型车胎宽在125-155mm之间、小型车大概在165-195mm之间、紧凑型车大概在195-225mm之间。
但需要注意的是,轮胎越宽,摩擦面就更大,必然会导致更大的噪音,阻力也越大,油耗越高,加速就越慢。所以要协调好车辆的动力性能和自身的经济性能,不能盲目加宽轮胎
扁平比
“45”代表的是轮胎的扁平比为45%,扁平比是指轮胎断高度与轮胎断面宽度的比值,所以扁平比越小就意味着轮胎越薄。轮胎越厚,走颠簸路时车身不会太跳动,舒适性越好;轮胎越薄,操控性越好,但舒适性就差点儿
子午线
“R”代表单词RADIAL,表示是子午轮胎。我们常见的轮胎都用R来表示, 俗称“钢丝轮胎”。这种轮胎能承受较大的内压力,弹性大,耐磨性好,使轮胎不易变形,轮胎使用寿命长
也有几个其他的字母,“X”表示高压胎;“一”表示斜交胎。斜交轮胎由于它的安全性、负载能力和高速稳定性差,因而只在部分低档越野车和重型货车上应用
钢辋直径
“18”是轮辋的直径,以英寸为单位,意思是用这个轮胎得匹配18英寸的轮辋。轮辋直径与扁平比相对应,大轮辋应使用扁平比低的轮胎
载重指数
“91”表示的是载重级别,可以负重615kg。载重指数是一个对应于最大载重量的数字,单位为公斤,表明了轮胎在正常充气情况下能够承受的最大重量。下面是轮胎常用载重指数对照表
如果汽车负重长时间超过对应范围,轮胎磨损加剧,缩短使用寿命,甚至会导致爆胎。切记在换轮胎是看清楚载重指数,新换的轮胎只能比原车轮胎载重指数高
速度级别
“W”指的是轮胎速度级别,W对应的最高速度为270km/h。速度等级表明轮胎在规定条件下承载规定负荷的最高速度。同样的,如果行驶速度超过这个速度极限,那么轮胎也会出现风险。下面是轮胎速度级别对照表
磨损极限
表明轮胎胎面磨损已到极限的标志,位于胎丽花纹沟的底部,稍稍高于沟底1.6 mm的凸台。当该轮胎的磨损接近4mm时,就要考虑更换轮胎了
3T指数
“3T”指的是Tread wear 耐磨指数、Traction牵引性能、Temperature温度指数,是美国交通运输所给轮胎定的分级标准。耐磨指数数字越大,轮胎更加耐磨,最低为160,最高为540。牵引性能代表轮胎抓地力水平,以AA/A/B/C进行标示,AA代表优秀,C代表最差。温度指数用A/B/C来表示,代表轮胎抗高温的性能,A为抗高温性能最强
生产日期
后两位数字表示年份,前两位表示周数,如果轮胎在生产出3年之后,即使没有使用也不能够换上车了,因为橡胶轮胎存在老化的现象
经过上述对轮胎全方位的解读
你对自己的轮胎有了更多的认识了吗?
原创文章,作者:cesifu,如若转载,请注明出处:http://www.cesifu.com/article/898.html
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