Not to be overlooked: The carrier cycle genre is becoming more diversified. The term ‘cargo bike’ has actually lost some of its pertinence by now, since we see these bikes used more and more to transport children. Like for all other bike- and e-bike categories, the DIN standard 79010 provides a minimum of safety and fitness for use. But more than that it cannot do.
The centre tube breaking
during a ride, with both mother and child going down: a scary thought that unfortunately has already become reality. Some of the damage cases in the field, i.e. during use, occurred with carrier cycles that have been successfully tested by their manufacturers in accordance with the DIN 79010 standard.
We were able to reproduce these failures from the field in the lab only after developing our own testing systems specifically for such cargo bikes that reflect further load types.
For a single-track cargo bike or carrier cycle, the standard sets out four different dynamic load tests for the frame. In contrast to this, our experience shows that the damage mechanisms up to now cannot be reliably precluded until having performed 42 tests with 11 different load types.
This can already be seen as proof that the variety of carrier cycles also needs the committed test engineers to match. Other load types must be added to the ones specified in the standard requirements and each load type from the standard must be increased to the special needs of each carrier cycle category or design.
In other words: Lumping Long-John bikes and Long Tails (“mullets”) together when it comes to testing is dangerous and could lead to failure.
Contact our team of test engineers so that we can train the result of your creative work and you can sleep peacefully.