US Mags U139 Santa Cruz Anthracite Gray with Diamond Cut Lip 20x10 5/5 (5/127) Bolt Pattern 5.74" Backspace +6MM Offset 78.1MM Hub Bore one-piece cast aluminium direct bolt wheel with a 20 spoke pro touring muscle car design. The Grey Santa Cruz is a popular rim for American classic cars, trucks and hot rods. U.S. Mags have decades of design and style, supporting rodder's and classic cars. In fact, it's been so long, US mags were there when your classic car was called a new car.