Will rims off a 1996 truck fit 1988 truck?

Maybe. It depends entirely on the *specific* makes and models of the trucks. Even if they're the same make (e.g., both Ford), the bolt pattern (number of lug nuts and their spacing), wheel diameter, and center bore (the hole in the center of the rim) might be different.

To know for sure, you need to:

1. Identify the exact make and model of both trucks. (e.g., 1996 Ford F-150 vs. 1988 Chevrolet C1500)

2. Find the specifications for the wheel bolt pattern and center bore for both trucks. This information is often available in owner's manuals, online forums dedicated to those truck models, or through a parts store using the VIN.

3. Compare the specifications. If the bolt pattern, center bore, and wheel diameter (which will influence overall fitment within the wheel well) are the same, they *might* fit. Even then, you may need to check for clearance with brakes and suspension parts.

Without this information, it's impossible to say if the rims will fit. Don't assume they will just because they are both trucks.