* Specific Model: The year isn't the only determining factor. The *model* of truck (e.g., C1500, Silverado, etc.) and even the trim level can influence wheel bolt patterns, wheel diameter, and offset. A 1990 C1500 rim might not fit a 1988 Silverado, for example.
* Bolt Pattern: This is the most crucial factor. The number of lug nuts and the distance between them must match. If the bolt patterns differ, the wheels won't bolt on.
* Wheel Diameter and Width: The diameter (size of the wheel itself) and width (how wide the wheel is) need to be compatible with the truck's suspension and brakes. Too big or too small could cause clearance issues.
* Offset: The offset refers to how far the mounting surface of the wheel is from the center line. Incorrect offset can affect handling and potentially cause rubbing against the suspension or body.
To be sure:
1. Find the bolt pattern for both the 1988 and 1990 trucks. This information is usually stamped on the inside of the wheel or can be found in a repair manual or online.
2. Compare the wheel diameter and width. Again, consult the wheels themselves or reference materials.
3. Compare the offset. This information is often harder to find, but is equally important.
If all three match, the rims *should* fit, but it's always best to double-check for clearance issues before driving. A slight difference in offset might lead to rubbing.
