What size are the lug nuts on a Dodge Ram truck?
Most Dodge Ram trucks use 9/16-inch lug nuts with 18 threads per inch (9/16-18 UNC) and a 60-degree conical seat on many factory wheels, but the exact size varies by model year, wheel type, and aftermarket options. Always verify on your vehicle before purchasing replacements.
Why the size varies
The Ram lineup spans multiple generations and wheel configurations, including steel and alloy wheels, aluminum rims, and aftermarket designs. Because lug nut size is tied to the wheel and hub design as well as the stud configuration, there isn’t a single universal size for all Ram trucks.
To determine the exact lug nut size for your Ram, use the following steps:
- Check the door jamb placard or the owner's manual where the wheel lug nut specification is usually listed under Vehicle Information or Wheels.
- Inspect the lug nuts themselves for markings or stamped size information; some nuts display thread size or hex size on the head or cap.
- Measure the lug nut hex size with a ruler or caliper and compare to standard sizes (common hex sizes include 13/16", 1", or 3/4").
- Identify the thread pattern by counting threads over a known length or by confirming with the wheel's manufacturer or Ram's parts catalog; typical Ram wheels use 9/16"-18 UNC, but some aftermarket wheels may use 1/2"-20 UNC or metric sizes like M14x1.5. Always verify with the wheel spec.
- Verify seating type (commonly 60-degree conical, but some wheels require different seats) and torque specification in the vehicle manual or wheel documentation.
These steps help ensure you have the correct lug nuts and torques for safe operation. If in doubt, consult a dealership, tire shop, or the wheel manufacturer with your exact year, model, and wheel size.
Official sources you can rely on
For the most precise information, refer to Ram’s official parts catalogs, the wheel manufacturer’s documentation, or your vehicle’s exact specifications on the owner’s portal. Providing your year, model (e.g., Ram 1500, 2500, 3500), trim, and wheel size will help a parts specialist confirm the correct lug nut size.
What to do next
Once you identify the precise lug nut size, keep a spare set in your maintenance kit and use the recommended torque from Ram’s manual when tightening to prevent damage to the wheel or studs.
Summary
In short, there isn’t a single lug nut size for all Dodge Ram trucks. While many Ram models use 9/16-18 UNC with a 60-degree conical seat, the exact specification depends on year, wheel design, and aftermarket parts. Verify on your specific vehicle using the door placard, owner’s manual, wheel documentation, or a trusted dealer to ensure a correct fit.
