parts of a semi truck

There are several parts of a semi truck. These parts include: the Interior, Exterior, Drive and steer tires, Electrical systems, and more. Learn more about these important parts of semi trucks by reading this article. You may even be surprised by what you’ve learned! If you don’t know what each part does or what it does for a semi truck, read on to learn about the most important parts of a semi truck.


The interior of a semi truck is not a huge place but it does have some neat features to make the experience more comfortable. Its space is a limited space, but with some careful planning, you can make the space more comfortable. Start by thinking about what you absolutely need. You can also plan for essential storage space. Listed below are some tips to make your semi truck interior more comfortable. All of these features will minimize downtime for both you and your drivers.


Though most people spend most of their time inside their trucks, the exterior of a semi truck is just as important to maintain. This includes the chrome bumpers, stainless steel visors, exhaust pipes, mufflers, resonators, and lockable fuel caps. These parts are easy to install and can give your truck a personal touch. In addition to these, if you’re interested in dressing up your rig, you can check out various stores that stock different kinds of semi truck exterior parts.

Drive and steer tires

While there is little direct relationship between drive and steer tires, they do have some common characteristics. Both are worn, and the tread thickness varies between them. You can measure the tread depth by using a penny. Lincoln’s head, 24/32 inches, is the minimum tread depth for steer tires. Federal regulations require that steer tires meet the same minimum tread depth as drive tires. A steer tire is more likely to experience irregular wear than a drive tire.

Electrical systems

During Part I of this series, I discussed the differences between the North American and European electrical systems on semi trucks. The differences in the two systems have important implications for truck design, but are largely minor. The basic components of the electrical system are similar for both, so let’s take a closer look at how they differ. An OEM chassis, for example, may use an EV drive train, or it may incorporate a hybrid or mechanical PTO system, or it may include range extension systems. The SAE Standard document defines voltage levels greater than 60VDC, and it covers operational and communication modes for connection systems. Additionally, it addresses system interlocks and isolation management.

Fuel delivery system

The Fuel delivery system of a semi truck must deliver the proper amount of fuel at the correct pressure to run a truck efficiently. Fuel pressure too low or too high can starve an engine of fuel, causing it to run rough and waste fuel. There are three different types of fuel delivery systems, each with their own unique characteristics. To understand which system is right for your truck, you must know a little bit about the fuel system.