Wheel balancers - are semi-automatic worth it? Why get a semi-automatic wheel balancer if you can have a fully automatic tyre balancing machine that does the job for you? Well, if the price is what you are looking for, then the semi-automatic tools are the perfect choice. Also, the balancers from REDATS provide balancing precision in all wheels. What does it mean that a tyre changer is semi-automatic? It means that you will need to insert all the rim parameters manually. In automatic units, it is the machine that does it for you.