Can the rims for a 1990 Chevy Astro van fit on 1999 van?

It's possible, but not guaranteed. While both are Chevy Astros, the bolt pattern (number of lug nuts and their spacing) might be different between a 1990 and a 1999 model. Also, the center bore (the hole in the center of the rim that fits over the wheel hub) and the wheel offset (how far the wheel mounts in or out from the hub) could vary. Even if the bolt pattern matches, differences in offset or center bore could cause problems with fitment or safety.

To be certain, you need to:

1. Determine the bolt pattern (PCD) for both the 1990 and 1999 Astro vans. This is usually expressed as something like 5x120.7 (five lug nuts on a circle with a diameter of 120.7 mm). You can find this information online through a wheel and tire size lookup, using the year, make, and model, or by looking at the wheels themselves (it might be stamped on the back).

2. Check the center bore diameter for both. Again, online resources or the wheels themselves will provide this information.

3. Compare the wheel offset (ET). This is often found stamped on the back of the wheel and is crucial for proper fitment and preventing rubbing. Different offsets can drastically affect how the wheel sits in the wheel well.

Only if all three of these measurements match exactly can you be reasonably sure the rims will fit. Even then, a slight variation in offset could cause problems. It's always best to err on the side of caution and double-check everything before mounting wheels. A qualified tire professional can help you verify compatibility.