8x180 Bolt Pattern
A bolt pattern, or lug pattern, is a parameter that defines the number of lug holes in the wheel and the diameter of the circle (PCD, Pitch Circle Diameter) that the lug holes form. 8x180 bolt pattern, or 8x7.09 when converted to inches, indicates the wheel has 8 lug holes spaced evenly on a circle with a diameter of 180 millimeters or 7.09 inches. The 8x180 bolt pattern is common to Chevrolet and GMC models.
The 8x180 bolt pattern is a specific configuration used primarily in the automotive industry to secure wheels onto the axle of a vehicle. It consists of eight bolt holes arranged in a circular pattern with a diameter (the circle that passes through the center of each bolt hole) of 180mm. This bolt pattern is notably utilized on certain models of heavy-duty trucks and commercial vehicles, especially within General Motors (GM) lineups from around 2011 onwards, including models of the Chevrolet Silverado HD and GMC Sierra HD. The switch to the 8x180 bolt pattern from the previously common 8x6.5 inch pattern was motivated by the need for a larger and more robust wheel hub assembly capable of supporting increased payloads and towing capacities. Vehicle owners with this bolt pattern must ensure that replacement or aftermarket wheels specifically match this specification to maintain proper fitment, vehicle performance, and safety standards. Wheels with an 8x180 bolt pattern are less common than more standard sizes, making the selection somewhat limited but specialized for heavy-duty applications.
Similar 8-Lug Patterns
Here are similar 8-lug patterns that can be used as an alternative to 5x114.3 bolt pattern.
| Bolt Pattern | Number of Lugs | PCD (mm) |
|---|---|---|
| 8x165.1 (8x6.5) | 8 | 165.1 |
| 8x170 (8x6.69) | 8 | 170 |
| 8x200 (8x7.87) | 8 | 200 |
| 8x210 (8x8.27) | 8 | 210 |
8-Lug Pattern Torque Sequence
The lug bolt pattern torque sequence is a critical procedure designed to ensure that the wheel is mounted securely and uniformly on the vehicle's hub, preventing potential issues such as wheel vibration or hub damage. This sequence varies slightly depending on the number of lug bolts but always follows a pattern that promotes even distribution of force. When tightening lug nuts or bolts on a wheel with a 8-lug pattern, follow the torque sequence shown below to ensure even and secure tightening. The process usually involves multiple passes: initially tightening bolts to a lower torque setting to seat the wheel properly, followed by final tightening to the manufacturer's recommended torque specification using a calibrated torque wrench. Adhering to this sequence and using the correct torque ensures the wheel is balanced and securely attached, reducing the risk of brake rotor warping and ensuring the safety of the vehicle.
Vehicles with 8-Lug Wheel Bolt Pattern
There are 4 vehicle models that have 8x180 bolt pattern. Select vehicle model for additional information.
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