What is the bolt spacing for a 1979 dodge D100?

There's no single bolt spacing answer for a 1979 Dodge D100. The bolt pattern (often referred to as lug pattern) depends on the wheel size and options chosen when the truck was manufactured. Dodge used several different bolt patterns on their D-series trucks during that era. To find the correct bolt pattern for *your* 1979 Dodge D100, you need to:

* Check your existing wheels: The easiest way is to count the number of lug nuts and measure the distance between two lug nuts that are opposite each other. This measurement is the diameter of the bolt circle.

* Consult your owner's manual: If you have the original owner's manual, it should specify the bolt pattern.

* Check the Vehicle Identification Number (VIN): The VIN might offer clues, though it's less direct than the other methods. A Dodge parts specialist or online VIN decoder might be able to help.

* Look at the truck's documentation: If you have any service records or build sheets, they might list the wheel specifications.

Common bolt patterns for Dodge trucks from that era include 5x4.5" (5 lug nuts, 4.5 inches across) and 5x5.5" (5 lug nuts, 5.5 inches across), but others are possible. Do not rely on general information; you must determine the correct pattern for your specific vehicle. Using the wrong bolt pattern is dangerous and could lead to wheel failure.