BBS CH-RII 659 - 20x11.5 5x130 ET47 CB71.6 Satin Black Center Platinum Lip Stainless Rim Protector WheelPERFORMANCE LINE BBS has been flow forming wheels since 1996. Flow forming is a procedure that uses a continuous rotational motion with 3 hydraulic rollers and tremendous pressure at high temperatures to "Form" the inner rim area of the wheel. This process changes the mechanical properties of the cast rim area to increase strength, stiffness and impact over "stiffness to weight ratio" which can deliver very high level of performance at a cost that is