What is the bolt pattern on a Chevy Express 6-lug?
The bolt pattern for a Chevy Express 6-lug is 6 on 5.5 inches (6x139.7 mm).
The Chevy Express van family (including the Savana in some markets) generally uses a 6-lug bolt circle across most models and years. This article explains the standard pattern and how to verify it for your specific van before buying wheels or adapters.
Bolt pattern basics
Understanding the bolt pattern helps you source compatible wheels and avoid mismatches that can affect safety and performance.
GM full-size van bolt pattern overview
For Chevrolet Express vans, the common lug arrangement is six lugs evenly spaced on a circle with a diameter of 139.7 millimeters (often referred to as 6x139.7 or 6x5.5 inches). This pattern is shared with many GM trucks and SUVs from roughly the same era, making many wheels interchangeable within GM’s full-size lineup.
How to verify the bolt pattern on your van
To help you verify the bolt pattern, use the following quick checks. The list covers how to confirm the 6x139.7 pattern and related fit considerations.
- Check the owner’s manual or a door jamb sticker for the wheel specifications, which should state the bolt pattern (6x139.7mm or 6x5.5").
- Measure the bolt circle yourself: lay a tape across two opposite lug holes and measure the diameter through the center to confirm it is 139.7 mm (5.5 inches).
- Count the number of lug holes to confirm there are six, ensuring they are evenly spaced around the circle.
- Verify the wheel offset and center bore compatibility with the factory hubs; even with the same bolt pattern, incorrect offset or hub bore can cause clearance or alignment issues.
- Consult a dealer or wheel professional if you plan to mix wheels from other GM models; many 6x139.7 wheels will fit, but some applications may require spacers or adapters.
Once you have confirmed the bolt pattern and related fitment details, you can proceed with selecting wheels that match your Express van’s specifications.
Why this matters for safety and performance
Using wheels with the correct 6x139.7 bolt pattern ensures secure mounting, proper loading, and accurate alignment. A mismatched pattern can lead to unsafe steering, wheel loosening, or brake interference. If you’re unsure, seek professional assistance before purchasing wheels or adapters.
Summary
The Chevrolet Express vans predominantly use a 6x139.7 mm (6 on 5.5 inches) bolt pattern on both front and rear axles. When shopping for wheels, verify the pattern, center bore, and offset for your exact model year, and consult a tire/wheel professional if you’re unsure. This ensures a safe, reliable wheel fit for your van.
