* 5x4.5" (5 lug, 4.5 inch bolt circle diameter): This is the *most likely* pattern for a 1987 Ford Ranger, particularly 2WD models.
* 6x5.5" (6 lug, 5.5 inch bolt circle diameter): This pattern is possible, especially for some 4WD models.
To be absolutely certain, you need to:
1. Check your existing rims: The bolt pattern is usually stamped or cast directly onto the back of the wheel.
2. Check your owner's manual: If you have the original manual, it should specify the bolt pattern.
3. Look at the wheel studs: Carefully count the number of studs and measure the diameter of the bolt circle (the circle connecting the center of each stud). Use a flexible tape measure for accuracy.
Don't rely solely on generalized information online; always confirm the bolt pattern on your specific vehicle. Using the wrong bolt pattern can be dangerous.
