1, if the patent only protects the structure of the wheel itself, but not the connection between the wheels, then your behavior is not infringing;
2. If the patent not only protects the structure of the wheel itself, but also protects the connection mode between the wheels, and your connection mode is consistent with that mentioned in the patent, then it is infringement;
3. If the patent protects the system, and the specially constructed wheel and the connection between the two wheels are all part of the technical features, then you may constitute indirect infringement, and whether you bear the tort liability depends on whether you have subjective intention.