Our commercial wheel 22.5 x 8.25 Truck/Bus Wheel is made of forged aluminum which allows the wheel to be lighter than steel wheels and has a metallic silver to fight erosion. Specification: Diameter: 22.5 in Width: 8.25 in Rim Material: Aviation-grade Forged Aluminum (6061) Bolt Pattern (PCD): 10x285.75mm Bore (CB): 220.1mm Max Load: 7400 LB Outset: 143mm Our commercial wheels are constructed by forging aviation-grade aluminum (6061) and then heat treated (T5T6) German CNC tools are used to construct our commercial wheels，The outside is polished like a mirror to reflect the face Less weight, greater strength, and increased lifespan compared to steel wheels Well balanced, low wobble, 30% increased tire lifespan Tried and true for 10 million+ trucks