NNX-D57 20X8.5 20X10 ET 25 40 P.C.D 5X112 center hole 66.6 1piece forged wheel (custom 16-24inch any date) Two pieces of forging refer to two types of wheels.   Forging wheels include single, dual and three pieces. The difference is the manufacturing process of the wheels. Single parts refer to the entire wheels, and the two pieces include the width of the wheels and wheels. Double wheels are fixed through high -strength bolts.   Two types of forging wheels can contain two colors, because the two -piece forging process is quite complicated, of course, the price of the wheel hub is still relatively high.