What Is the Difference Between an 18 Wheeler and a Semi-Truck?

When discussing transportation methods, two specific trucks often come to mind: the 18-wheeler and the semi-truck. Both of these large vehicles are used for hauling goods and materials across vast distances, but there is a distinct difference between the two in terms of their size and load capacity.

The 18-wheeler is a much larger vehicle than the semi-truck, and can accommodate more weight. It typically has a length of about 70 feet, as opposed to a semi-truck’s length of around 48 feet. This extra space allows for more cargo to be loaded onto the trailer – up to 80,000 lbs versus the semi-truck’s maximum of 34,000 lbs. The 18-wheeler also has an additional axle with two extra wheels on either side of it, which helps to evenly distribute the weight of its load.

In addition to its size and load capacity differences, an 18-wheeler also requires different licensing than a semi-truck in order to operate legally on public roads. The driver must have a commercial driver’s license (CDL) with special endorsements such as hazardous materials or double/triple trailers in order to drive an 18-wheeler safely and legally.

Finally, due to its larger size and heavier load capacity, an 18-wheeler consumes more fuel than a semi-truck does when driving long distances – up to nine times more! This means that it costs more money for companies transporting goods over long distances with an 18-wheeler than it does with a semi-truck.

Conclusion:

The distinction between an 18 wheeler and a semi truck are clear – they differ in size and load capacity. An 18 wheeler is larger than a semi truck and can carry up to 80,000 lbs compared to 34,000 lbs for a semi truck. Additionally, special licensing is required for operating an 18 wheeler on public roads, along with higher fuel consumption costs due to its larger size.

Photo of author

Karen Watkins