Understanding the 2016 Impala bolt pattern is essential for any owner or enthusiast looking to upgrade wheels or perform maintenance. This specific measurement dictates the fitment of wheels to the vehicle's hub, ensuring safety and proper alignment. The 2016 model year follows a long lineage of designs, making it critical to verify the exact specifications before purchasing new rims or tires.
Defining the 2016 Impala Bolt Pattern
The bolt pattern on a 2016 Chevrolet Impala is 5x115. This notation indicates that the wheel has five lug holes arranged in a circle with a diameter of 115 millimeters. This standard is common across many General Motors vehicles of that era, but verifying this specific configuration is vital for compatibility. Installing a wheel with a different pattern can lead to improper seating and dangerous driving conditions.
Why Accurate Measurements Matter
While the 5x115 pattern is standard, the center bore and offset are equally important for a perfect fit. The center bore is the hole in the center of the wheel that slides over the hub; it must be close to the vehicle's hub diameter to prevent vibration. Offset refers to the distance between the wheel's mounting surface and its centerline, affecting handling and whether the wheel clears the suspension or fenders.
Center Bore and Offset Details
Center Bore: Typically around 67.1mm for GM vehicles, but verifying with a measuring tool is recommended.
Offset: The 2016 Impala usually utilizes an offset between +45 and +52 millimeters.
Backspacing: Measured from the back of the wheel to the mounting surface, this affects clearance for brakes and suspension.
Measuring Your Current Wheels
If you are unsure of your current setup, you can measure the bolt pattern yourself. Count the number of lugs and measure the distance between the center of one lug hole to the center of the hole directly across from it. For the 2016 Impala, this distance should be approximately 115mm. Using a tape measure or a specialized gauge ensures accuracy for replacement parts.
Compatibility with Aftermarket Wheels
When selecting aftermarket wheels, the 5x115 pattern opens up a wide range of options from various manufacturers. However, you must ensure the wheel's specifications match the vehicle's requirements. Look for wheels specifically listed as compatible with the Impala or other GM models sharing this pattern to avoid the need for drilling or modification.
The Role of Lug Nuts
Lug nuts are not one-size-fits-all; they must match the thread size and pitch of the wheel studs. For the 2016 Impala, the common thread size is M12x1.5. Using incorrect lug nuts can strip the threads or cause the wheel to become loose over time. Always replace lug nuts in sets and ensure they are tightened to the manufacturer's specified torque using a torque wrench.
Safety Considerations and Maintenance
Regularly checking the tightness of the lug nuts is a critical safety practice. Driving vibrations can loosen them, leading to wheel detachment. When rotating tires or performing brake service, it is the perfect opportunity to inspect the studs and ensure the lug nuts are secured to the proper torque specification. This simple maintenance step extends the life of the wheel assembly and protects the vehicle's suspension.
