Range of diameter centering cone: 4 cones: 1.7" - 5.2" Length of shaft: 7.5" (190 mm) Diameter of shaft: 1.57" (40 mm) Measuring speed: 200 rpm Balancing accuracy: 0.05 oz (1g) Scanner accuracy: 0.0039" (0.1 mm) Wheel width (dynamic balancing): 3 - 20" Wheel diameter: 8 - 30"