When we need to replace the wheel hub for our passenger cars/ Suvs/offroad vehicles, we face the parameter data for the hole spacing, size, ET value, and J value , CB, PCD. What's meaning of size 15 inches, 16 inches, 17 inches, 18 inches, 19 inches, and 20 inches, 21 inches, 22 inches, 24 inches ? Jwheel will take you to take a look at these data now.