What size is the Chevy 6 lug pattern?
The Chevy 6-lug pattern is 6 on 5.5 inches, also written as 6x139.7 mm, which is the bolt circle diameter used on most GM trucks and many GM SUVs.
Pattern size and where it's used
The following notes the typical scope of the Chevy 6-lug pattern and what to consider when shopping for wheels or adapters.
Before you shop for wheels, remember that compatibility depends on the bolt circle, hub bore, offset, and backspacing. The list below highlights the core facts and practical considerations.
- Bolt circle size: 6x139.7 mm (6 on 5.5 inches) is the standard Chevy/GM 6-lug pattern used on most trucks and full-size SUVs.
- Common applications: Chevrolet Silverado and Sierra pickup trucks, Tahoe and Suburban SUVs, Avalanche, and their GMC counterparts (Sierra, Yukon, and related models) share this pattern.
- Hub bore: GM trucks typically require a hub bore around 78.1 mm (3.07 inches); verify your exact year and model because some variations exist.
- Wheel compatibility: Even with the same bolt pattern, offset and backspacing matter for clearance with brakes, fenders, and suspension components. Always confirm these specs for your wheels and tires.
- Cross-compatibility: Many aftermarket wheels are designed to fit the 6x139.7 mm pattern, but adapters or rings may be needed if you’re matching to a different hub bore or lug size.
Bottom line: The Chevy 6-lug pattern most commonly means 6x139.7 mm (6x5.5 inches), and it is widely used across GM trucks and SUVs. Always double-check your exact model-year specs and measure hub bore/offset when purchasing wheels.
How to measure your bolt pattern
Use these steps to confirm your vehicle’s bolt pattern if you’re unsure what you have or if you’re considering aftermarket wheels.
- Count the number of lug holes on the wheel mounting face — if there are six, you’re dealing with a 6-lug pattern.
- Measure the bolt circle diameter (BCD): measure straight across the wheel through the centers of two opposite lug holes. This gives you the diameter in millimeters or inches (139.7 mm or 5.5 inches for Chevy GM 6-lug).
- Check hub bore size by locating the opening in the hub that the wheel centers onto; GM trucks commonly use 78.1 mm, but verify for your exact year/model.
- Note the required offset and backspacing for wheels to ensure proper clearance with brakes and suspension components.
- If you’re unsure, bring the vehicle information (year, make, model) to a wheel professional or consult the factory specs to confirm compatibility.
Following these steps helps ensure you select wheels that fit correctly without clearance or safety issues.
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