What is the bolt pattern on the Chevy Astro?
The Chevy Astro uses a five-lug bolt pattern on a 4.75-inch bolt circle (5x114.3 mm). This is the standard pattern for the Astro and its GMC Safari sibling and is widely supported by aftermarket wheels.
Bolt pattern specifics
Key figures you need to know before buying wheels or adapters are the lug count and the bolt circle diameter.
- Lug count: 5
- Bolt circle diameter: 4.75 inches (114.3 mm)
- Wheel compatibility: fits Chevy Astro and GMC Safari vans; compatible with many aftermarket wheels offered in 5x114.3
Understanding these basics helps ensure your wheels bolt on cleanly and align properly with the vehicle's hubs and braking components.
Years and cross-vehicle compatibility
The 5x4.75-inch bolt pattern is consistent across the Astro's production span and is shared with the GMC Safari. This makes wheel sourcing easier if you are restoring or maintaining a fleet of vans.
- Model years covered: 1985–1994 (first generation) and 1995–2005 (second generation) for the Chevy Astro; the GMC Safari mirrors the same pattern
- Aftermarket support: a wide range of 5x114.3 wheels are available for trucks and vans
- Fitment notes: verify wheel offset and brake clearance; some wheels may require spacers or hub rings for proper centering
Before purchasing, confirm the exact pattern on your vehicle by checking the owner's manual, vehicle VIN details, or measuring the lug pattern directly.
Summary: The Chevy Astro uses a 5-lug, 4.75-inch bolt circle (5x114.3 mm) bolt pattern across its production run, shared with the GMC Safari. This keeps wheel compatibility straightforward, but always verify fitment, offset, and hub bore with the part that you buy.
What is the bolt pattern on a 2003 Chevy Astro?
The 2003 Chevy Astro has a 6-lug bolt pattern with a 5.5-inch (or 139.7mm) bolt circle diameter. This is a common pattern for many Chevrolet trucks and vans.
- Bolt Pattern: 6x5.5" or 6x139.7mm
- Lug Count: 6 lugs
What is the bolt pattern on a 1999 Chevy Astro?
The 1999 Chevy Astro Van has a 5x127mm bolt pattern, also known as 5x5. This means it has 5 lugs with a bolt circle diameter of 127 millimeters.
- Bolt Pattern: 5x127mm
- Alternative Measurement: 5x5
- Meaning: There are 5 lug holes, and the distance from the center of one bolt hole to the center of the opposite bolt hole is 127mm.
Is 5x5 bolt pattern the same as 5x127?
Yes, a 5x5 bolt pattern is the same as a 5x127 bolt pattern, as 5x5 is the imperial measurement and 5x127 is the metric equivalent. This means wheels with a 5x127 bolt pattern will fit a vehicle with a 5x5 pattern, and vice versa, as both indicate five bolts spaced evenly over a 127mm (or 5-inch) circle.
- What it means: The "5" refers to the number of bolt holes, and the "127" or "5" refers to the diameter of the circle that the bolt holes are measured on (in millimeters and inches, respectively).
- Common applications: This bolt pattern is common on many vehicles, including newer Jeep Wranglers and Grand Cherokees, as well as various GM and other models.
- Interchangeability: Because the imperial and metric measurements are equivalent, a wheel with a 5x5 pattern can be fitted onto a vehicle that uses a 5x127 pattern, and vice versa.
What is the bolt pattern on a Chevy Astro van?
The Chevy Astro van has two bolt patterns depending on its generation: 5x127 (5×55 cross 55×5 inches) for models from 1985-2002, and 6x139.7 (6×5.56 cross 5.56×5.5 inches) for later models from 1995-2005. The change to the 6-lug pattern occurred during the second generation, which started in 1995.
| Generation | Production Years | Bolt Pattern |
|---|---|---|
| I | 1985–1994 | 5x127 (5×55 cross 55×5 inches) |
| II | 1995–2005 | 5x127 (5×55 cross 55×5 inches) for 1995-1997 and 6x139.7 (6×5.56 cross 5.56×5.5 inches) for 1998-2005 |
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