Feature: The column takes 4 golden linear plain bearings. Rim with adjustable width 50-200mm. Wheelset between 10-29 inches Three test table Detects the circle of the deflection of hitting and slippery of the brake disc. The bottom plate was processed by CNC more smoothly. CNC adjust knob, use more comfortable, touch more comfortable. Specifications: Material: aluminum alloy color：Silver Package size: 510*310*100mm/20.1*12.2*3.9in Package weight: 5700g / 12.6lbs Packing list: .