Bicycle Successfully Tows Massive Trailer Weighing 15,000 Kilograms

The Bicycle Attempting to Tow a Giant Trailer

A humorous concept in physics refers to the "spherical cow," an irony concerning the assumptions physicists make when tackling a new problem. While simplifying a problem aids in understanding the fundamentals, these assumptions are quickly called into question in real-world applications. This was the case for Seth from Berm Peak, who attempted to tow a massive trailer with a bicycle. Theoretically, a bicycle needs only a sufficiently high gear ratio, but numerous other issues quickly arose that needed addressing.

Seth opted for a tandem bicycle for this project. Not only does having a second cyclist add power, but the longer base of the bicycle helps prevent the weight of the trailer from lifting the front wheel off the ground. The bicycle was modified with a Class 3 towing hitch and a battery to activate the trailer's electric brakes in case of emergencies. After the initial hookup of the trailer, problems began to occur. With such a high gear ratio, the bicycle was very slow and difficult to keep straight. Custom training wheels were added between the cyclists for stability, but the immense weight caused problems with the chain, and at one point even damaged the bicycle's freehub.

Ultimately, Berm Peak succeeded in towing a Ford F-150 Lightning with a trailer a few meters up a hill, demonstrating this proof of concept. This might represent the maximum limit that a bicycle can tow without the assistance of an electric motor, although practical applications for such an achievement are likely limited. He has also undertaken other bicycle projects, including refurbishing abandoned e-bikes by removing proprietary components.