M45 PORTAL | Finish GLOSS BLACK MILLED | size desc 20X7 | lug count 4.0 | bolt pattern metric 4X137 | bolt pattern standard 4X137 | offset 00 | backspacing 4.0 | centerbore 112.1 | load rating metric 453.0 | load rating standard 1000.0 | division 20 | barrel config R | shipping weight 31.72 | box label desc G-BLK MILL | finish warranty ONE YEAR | structural warranty LIFETIME | rivet part no NONE | lip depth 2.07 | construction type Cast Aluminum | bolt pattern mm12436 137