The K22 shaft is fixed so that the wheel rotates freely on its own bearings. This simulates exactly the assembly of the wheel on the motorbike and eliminates all the assembly inaccuracies which are inevitable with traditional balancing machines for car wheels where the adapter is put in rotation with the wheel. Universal space saving wheel balancer with excellent technical specifications combining a sturdy structure with attractive and modern design K22 balances bearing type wheels, scooters wheels (hand spin), and single sided swing arm (with optional AGF adaptor set) Automatic Distance & Diameter Entry (2D) Self-Diagnosis and Self-Calibration Menus for quick selection of the following: ounces to grams inches to millimeters unbalanced thresholds 0.1 or 0.25 ounces (1 or 5g) Optimization program for compensation of rim and tire unbalance “Static” and “Dynamic” program 12-Compartment Weight Tray + Adapters compartment