However, the style of this burdensome journey changed dramatically with a groundbreaking innovation: the wheel. For a long time, people were accustomed to carrying suitcases on their shoulders or by hand. In 1970, an American businessman named Bernard Sadow, inspired by the difficulty of carrying heavy luggage at airports, came up with the idea of attaching four small wheels to the bottom of a suitcase and pulling it with a strap. Although this design was not widely accepted at the time, it was undoubtedly the most important step in the history of suitcases.

The true popularization of the wheeled suitcase began a decade later, thanks to Robert Plath, a pilot for Northwest Airlines in the United States. He invented the "Rollaboard," which combined wheels with a retractable handle. This allowed suitcases to be pulled by hand, enabling travelers to easily transport their own luggage without relying on porters. From this moment on, the suitcase was no longer a heavy burden to be carried, but a "travel companion" that anyone could easily take on a journey. This invention was truly a social revolution, transforming travel from a privilege into something accessible to the masses.