* Bolt Pattern (PCD): This refers to the number of lug nuts and the diameter of the circle they form. The Alero and Honda models have different bolt patterns in most cases. You MUST match this exactly.
* Wheel Diameter: The diameter of the wheel (e.g., 15", 16", 17"). The Alero's factory wheels likely fall within a specific range, and using a significantly larger or smaller diameter may cause clearance issues.
* Wheel Width: The width of the wheel, usually expressed in inches. An incorrect width can also lead to fitment problems.
* Offset: This measurement indicates how far the mounting surface of the wheel is from its centerline. Offset affects how far the wheel sits inside or outside the wheel well. Mismatched offsets can cause rubbing against the suspension, brakes, or body.
* Center Bore: The hole in the center of the wheel that fits over the hub. The center bore must either match exactly or use a hub-centric ring adapter.
In short: You cannot simply assume Honda rims will fit. You need to find the exact specifications for both the Honda rims you're considering *and* your Oldsmobile Alero's factory wheels (found in your owner's manual or online resources). Then, compare the specifications. Even if the bolt pattern matches, differences in offset and width are very likely to create problems. A slight difference might be okay, but you run the risk of rubbing, affecting handling, and even damaging your vehicle. A professional tire shop can help verify compatibility.
