Petrol Octane - 18, 19 and 20 inch wheels for Mercedes-Benz, BMW, Lexus and Infinti sedans and coupes - A distinguished version of the classic five-spoke wheel design, the Octane has squared up spokes for a stronger presentation than rounded spokes would present. Each spoke is wider at the center than at the edge of the wheel, giving the illusion of spanning a great distance. The shape also give greater caliper clearance, and the inserted stainless steel lip is polished to a chrome-like mirrored luster.