The inexpensive one. The steel wheel, which weighs around 3 kilos, costs only 35 euros. Due to the rather narrow handlebar angle limit of 60 degrees, it provides support for insecure children, but loses some of its manoeuvrability. In the driving test, it is satisfactory. The instructions for use are only on the box...

The relatively light wheel from the supplier Decathlon is "very good" in the practical test. However, in a mixed sample of grips and seat, the laboratory detected a highly elevated level of polycyclic aromatic hydrocarbons (PAHs) suspected of causing cancer. Cheapest bike in the test.