Tires are a crucial part of any vehicle, and they’re often overlooked. If you take a moment to really consider it, you’ll realize they are involved in everything from accelerating, to steering, to braking. Any time the car is moving (and even when it’s not; it’s gotta stay put somehow, right?) the tires are playing a key role. Naturally, you’ll want each tire to be the best it can be, as they can only be as good as their weakest link.
What about mixing and matching tires? Brands? Models? SIZES? There are a lot of things to think about here. Usually this is a bad idea, but in a pinch or certain situations it can be OK. Let’s take a look at what it can really mean to mix your tires around and how it affects the way your car performs.
目录
混合品牌或模型
不同品牌的轮胎，甚至来自同一品牌的不同型号，在路上的行为都会有所不同。每个设计都有一个特定的目标。目标可能是优先考虑胎面寿命，干抓地力，安全，舒适甚至燃油经济性。许多轮胎结合了不同的方面，一次实现两个或多个目标。
假设您的ho-hum，“让我从A到B”每天的驾驶员有一个公寓。您不想在四个轮胎上花费数百美元（我的意思是，谁会？），因此您选择仅替换一个。不幸的是，您的汽车上的轮胎已经停止，因此您将获得完成工作的第一个货架模型。98％的时间，这完全很好，但是您应该记住一些事情会改变。
您的汽车的ABS和牵引力控制（如果有的话）单独读取每个轮子的速度，以确定您是否失去了牵引力。当它看到足够大的速度差异时，它决定了正在发生的事情（制动锁定，旋转等）并采取相应的作用。问题是，有了不同或全新的轮胎，总直径将与其他三个轮胎略有不同。这意味着新的必须更快或更慢以覆盖相同的距离，从而导致单个车轮速度之间的差异。
同样，大多数情况下，没有足够的差异来真正引起问题。只要您使用相同的尺寸并且在正常驾驶中，它应该可以正常工作。对于以性能为导向的汽车，或“富有活力”的汽车驱动的汽车，最好至少成对更换轮胎。这既是前部或两个后方。无论如何，从一侧到另一侧混合都是一个坏主意。
轮胎尺寸差异
那尺寸呢？他们可以混合吗？简短的答案是否定的，但这绝不是那么容易。我们知道有些汽车的后部尺寸更大，有些汽车（很少）在前面的尺寸更大。显然这些很好，因为它们是这样设计的。坚持这些直径极为重要，但是，变化更大的可能影响牵引力和ABS逻辑。
Maybe you’re interested in a staggered setup like this but your car is “square” (has the same size tire on the front and back). It’s possible in certain situations to put a larger size on the rear, provided you keep the overall diameter as close as possible to the original size. It also hinges somewhat on how sophisticated your traction and ABS systems are. Most newer vehicles are going to be too sensitive to accommodate using different sizes.
Finally, if you’re in a pinch and are thinking about putting ONE differently sized tire on your car, just don’t. You’ll have a horrible pull to one side that will get worse with braking, and it’s almost guaranteed to screw with your traction control. It could also cause driveline damage in extreme cases. It’s worth it to do the extra leg work to find a tire in the same size as your other three.
特殊的AWD注意事项
全轮驱动可能是一件挑剔的事情。整个点是额外的牵引力，无论是天气还是表现。因此，大多数AWD汽车对它们的牵引力控制的运作方式都稍为重视。他们将对混合轮胎尺寸和握力级别更敏感，但这是您最不担心的。
When I mentioned driveline damage earlier, you may have thought “No way. How’s that even possible?”. You wouldn’t be alone, but rest assured that it can happen. ESPECIALLY on AWD.
从理论上讲，开放式差速器和两轮驱动汽车的传动系统可以以完全不同的速度旋转，并且对其进行完全很好的旋转。但是，AWD有4个轮子一起工作，其中两个可以转向。当您将有限的滑动差速器（LSD）带入混合物中时，当轮胎混合时，情况确实会变得危险。
以Subaru STI为例。它的传动系统有三个有限的滑动差速器。所有的计算机都假设您的尺寸轮胎在汽车的每个角落都具有相同水平的握力。基于此和车轮速度传感器的信息（除其他外），它决定了在任何给定时刻向哪个车轴发送多少功率。
Now let’s put one smaller tire on the right rear. The rear LSD is now binding against itself constantly, trying to get the rear wheel speeds more in sync. LSDs are designed to bind; it’s how they work, but when it happens constantly it will overheat. Heat causes the gear oil to break down and could eventually burn up the differential.
Hang on, it gets worse. The STI has a center differential, too, that controls the front and rear balance. Since the rear overall is now spinning faster, the center diff is binding as well.
不同类型的轮胎和性能驾驶
因此，您现在可以看到为什么在汽车上扔错误的尺寸可能会很糟糕。但是，不同风格的轮胎风格又如何呢？在前后有两种不同的化合物是否有任何性能好处？
通常，您需要每个角落的握力相同。为了驾驶性能，这几乎是不熟悉的。有些人在前或后方的抓地力较小，但要自行进行。混合化合物可以使预测汽车的行为方式和对道路情况的反应变得更加困难。特别是对于充满活力的驾驶，最好保持握力均衡。它会更安全，您也可能会有更好的单圈时间。
终点线
There you have it. Simply put, a different tire is usually fine on your everyday car, provided you use the same size. For performance driving, AWD and sports cars, try to stick to the same size and type of tire on each wheel and you’ll have much better results.
如果您需要交错的设置，请谨慎行事并做功课。看看其他人是否在您正在考虑的尺寸上取得成功，并研究车辆的牵引力控制系统。如果您不这样做，您可能会发现自己遇到问题，因为轮胎您刚刚花费了不错的变化。
与往常一样，驾车，朋友，朋友。
