* Check your owner's manual: This is the best source of information. It will specify the correct size for your specific truck.
* Look at the nut itself: If you can access the hub nut, the size might be stamped on it.
* Check a parts store website: Websites like AutoZone, Advance Auto Parts, or Napa Auto Parts allow you to search for parts by vehicle year, make, and model. Entering your truck's details will show the correct hub nut size.
* Take the nut to a parts store: A parts store employee can identify the size using their tools and resources.
Without knowing the specific model (e.g., Ram 1500, 2500, 3500, Dakota) and whether it's a 4x2 or 4x4, it's impossible to give you the correct answer.
