JNC wheels are a low pressure cast wheels. Low pressure casting uses positive pressure to move the molten aluminum into the mold quicker and achieve a finished product that has improved mechanical properties (more dense) over a gravity cast wheel. Low-pressure casting has a slightly higher production cost over gravity casting. Low pressure is the most common process approved for aluminum wheels sold to the O.E.M. market. Low-pressure cast wheels offer a good value for the aftermarket as well. Center Bore 73.1MM Lip Size 2-4 Inch Size 17x8.518x1018x818x917x9.519x8.519x9.520x1020x8.5 Bolt Patern 5x114.35x1205x1005x112 Offset +30mm+25mm+22mm+34mm+32mm+35mm