To find the bolt pattern, look at the wheel and count:
* Number of lug nuts: This will typically be 5 or 6.
* Diameter of the bolt circle: Measure the distance between two lug nuts directly across from each other (through the center of the wheel). This is usually expressed in inches.
Common bolt patterns for that era Dodge Ram include 5x4.5" and 5x5.5", but again, you must verify this on your specific vehicle.