BBS CH-RII 21x9.5 5x112 ET30 PFS Platinum Center Black Rim SS Rim Protector Wheel w/Motorsport Etch

One Piece Counter Pressure Cast Wheel with Flow-formed rim - Back-milled spoke area - Featuring stainless steel rim protector - Weight optimized by FEM analysis
 
PERFORMANCE 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 much lower than a forged wheel.