Pontiac GTO Wheel Lug Patterns, Offset & Center Bore Reference

The Pontiac GTO is a classic muscle car with specific wheel mounting requirements that vary by model year. Understanding the correct wheel lug pattern, offset (ET), center bore, and rim size is crucial for proper wheel fitment and vehicle safety.\n\nPontiac GTO wheel lug patterns are typically expressed as lug count × PCD (pitch circle diameter in millimeters). Commonly, GTO models featured a 5-lug pattern, with PCD measurements around 120mm. Offset values (ET) can vary depending on the wheel design and manufacturing year, typically ranging from ET10 to ET25.\n\nThe center bore dimension ensures the wheel mounts properly on the hub without causing vibrations. Pontiac GTO center bore sizes are generally around 70.3mm. Rim sizes for the GTO span from 14-inch diameters on earlier models to larger 16- and 17-inch rims on later years, catering to both style and performance requirements.\n\nConsulting a year-sorted Pontiac GTO wheel lug pattern catalog helps enthusiasts and mechanics find precise fitment information. This reference ensures the right combination of bolt pattern, offset, and bore size to maintain optimal handling and aesthetics.