Specs 2 Wheel Adapters / Spacers Vehicle Bolt Pattern 5 x 114.3mm (5 x 4.50) Wheel Bolt Pattern 5 x 114.3mm (5 x 4.50) Thickness 20mm (0.79") Thread M12x1.5 Center Bore 60.10
Hub Centric to the vehicle and the wheel. Adapter is deemed Hub Centric when the inside diameter exactly matches to the hub, reducing vibration and stress on the lug nuts.
Adapters are made of Air Craft Quality 6061-T6 Aluminum. 6061 aluminum is an alloy that contains magnesium and silicon as its major alloying elements. T6 refers to the heat treatment process that involves various solutions and artificial aging that increases the overall strength of the material.