How tall is a trailer on an 18 wheeler?

The height of a trailer on an 18-wheeler typically ranges from about 13.5 to 14.5 feet (approximately 4.1 to 4.4 meters) when fully loaded. However, the standard legal height for most commercial vehicles in the U.S. is 13.5 feet. The exact height can vary depending on the type of trailer and its cargo. Always check specific regulations, as height restrictions may vary by state or region.