When it comes to truck wheels, every detail matters to tolerate its heavy weight. Any driver should understand the importance of selecting the right wheel components to enhance performance and functionality from engine power to towing capacity. The bolt pattern is a crucial aspect that often demands attention, as it directly affects wheel fitment.

Some uncommon options like the 8×180 bolt pattern are usually ignored. Is it in your truck? Confirming your vehicle’s bolt pattern before making any wheel purchases or modifications is an important step. Scroll down to check whether your vehicle comes with this design.

What Is The 8×180 Bolt Pattern?

The 8x180mm or 8×7.08 inch pattern refers to a wheel configuration including 8 stud nuts and a pitch circle diameter of 180 millimeters or 7.08 inches. In simple terms, there are 8 studs on the wheel, arranged in a circular shape.

Each is spaced evenly apart from its neighboring holes. The diameter of the imaginary circle is measured from the center of a random lug to the same position as the one opposite it.

Many also refer to this pattern as 8×7.08 inches. Both have the same format: the stud count x bolt circle diameter. The change in the second number comes from the conversion from millimeters to inches.

What Cars Have The 8×180 Pattern?

The 8×180 lug pattern allows for increased load capacity and durability. Hence, you often come across it on heavy-duty trucks, mainly vehicles manufactured by General Motors (GM). Compared to other options, it is not very popular.

Brand	Model	Manufacturing Year
Chevrolet	Silverado 2500	2011 – 2018
	Silverado 2500 HD	2011 – 2023
	Silverado 3500	2011 – 2023
GMC	Sierra 2500HD	2011 – 2023
GMC	Sierra 3500HD	2011 – 2023

FAQs

Are All GM 8-Lug Patterns The Same?

No, GM 8-lug patterns are not the same. While General Motors does utilize 8-lug lug patterns on some of their trucks, the specific design can vary depending on the model and year of the vehicle.

For example, the 8×180 is commonly used by heavy-duty trucks such as the Chevrolet Silverado 2500HD and 3500HD, as well as the GMC Sierra 2500HD and 3500HD starting from 2011.

However, other truck models may feature different 8-lug patterns. For instance, the 8×165.1 (8×6.5) appears on earlier models, including GMC ½ -ton or ¾- ton pickups.

What Is The Standard 8 Lug Pattern?

The standard 8-lug stud design commonly consists of 4 options: 8×165.1, 8×170, 8×180, and 8×200, used in different vehicles. Here is a breakdown of each design:

8×165.1 (or 8×6.5): It is often found on trucks from Chevrolet, GMC, Ford, and Dodge, particularly older models. This pattern includes 8 studs that create a circular pattern with a diameter of 165.1 millimeters (or 6.5 inches).
8×170: This design is deemed as a signature characteristic of Ford trucks, including the F-250 and F-350 Super Duty models. The number of lugs remains unchanged, but the pitch circle diameter increases to 170 millimeters.
8×180: It is primarily associated with General Motors (GM) trucks, as mentioned above.
8×200: It is less common but can be found on certain heavy-duty trucks, mostly in commercial applications.

Will 8×180 Fit 8×6.5?

Unfortunately, the 8×180 will not fit the 8×6.5 due to different dimensions. The 8×6.5 inch lug pattern, also known as 8×165.1, features 8 stud nuts with a circle diameter of only 165.1 millimeters compared to 180 millimeters.

The good news is that you can use common wheel adapters to close the gap. There are three sizes for your preference: 1-inch, 1.5 or 2-inch wheel adapters. However, we recommend the 1.5-inch option for the best effectiveness and safety, then the third one, and the first choice comes as a last resort.

Can You Fit Different Bolt Patterns?

Changing a vehicle’s bolt pattern involves more than just a simple modification. It typically requires specialized equipment, knowledge, and expertise. Below is the step-by-step tutorial:

Identify the current pattern of your vehicle and the desired one you want to change to.
Select wheel adapters that correspond to the two designs in progress.
Measure the diameter of your vehicle’s hub and the spacing between the hub and the wheel.
Clean the hub surface thoroughly to ensure a proper fit. Place the wheel adapter onto the hub, aligning the studs with the existing holes. Make sure the adapter sits flush against the hub.
Install the provided lug nuts onto the wheel adapter. Tighten the lug nuts in a star or cross pattern according to the manufacturer’s recommended torque specifications to ensure proper seating.
Mount the wheels on the adapters and align the holes on the wheel with the threaded holes on the adapters.
After installation, conduct a thorough inspection to ensure the wheels are securely mounted, aligned correctly, and free from interference or rubbing.

Conclusion

The 8×180 bolt pattern is a specific configuration designed for certain General Motors (GM) trucks. It plays a crucial role in ensuring proper fitment, alignment, and safety for the wheels installed on these vehicles. Attempting to install wheels with a different design can lead to issues such as improper seating, vibration, lug nut incompatibility, stress on components, etc.

When considering wheel replacements or modifications, it is always recommended to consult with a professional automotive technician or specialist for thorough advice.