Purchased new from the UAG website and assembled only once, with very little use. Equipped with abec9 oil-filled bearings, the highest grade of bearings for fingerboards. Because they are oil-filled, they don't spin for very long, but the feel is very smooth and durable, providing a smooth ride. The bearings are positioned on the sides, so the nuts won't stick out from the wheels. The lock nuts are hidden, giving the setup a clean and stylish look. Size: Big street Thickness: approx. 4.8mm Outer diameter: approx. 8.3mm