Gram Lights 57DR 17x9 +38 5x100 Glossy Black Sensei 6 Gram Lights 57DR 18x9.5 +38 5x100 Ceramic White Pearl Wheel. Speed Gram Lights 57DR 17x9 +38 5x100 Glossy Black Sensei 6 179 +38 Gram Lights 57DR Jackson Racing. This Gram Light 57DR is the most affordable wheel made by Rays Engineering. When making this design, Rays optimized the design and construct while still ensuring proper strength and rigidity. The 57DR is a cast wheel, so it will be heavier than Forged and other Flow Formed Wheels, however, this semi gloss black wheel is meant to withstand the abuse of the track and is just as strong if not stronger than any wheel out there. Cast one piece wheel meeting JWL + R Spec 1 standards Modeled after the 57D, but exclusive to the American Market High rigidity high strength models suitable for Racing Gunblue High speed air valve included Optional center caps sold separately Made by Rays Co., Ltd. in Japan