OE Quality
60-Day Returns

National 39585 Wheel Bearing - Rear Inner or Rear Outer
Overview of National 39585 Wheel Bearing Cone
The National 39585 wheel bearing cone is engineered for reliable driveline performance in Chevrolet 3500 and Ram P30 vehicles. This taper bearing cone is designed with precise dimensions to ensure proper fit and function in your wheel assembly.
- Cone Bore Diameter: 2.5000 inches (63.5 mm)
- Cone Length: 1.1875 inches (30.163 mm)
- Cone Radius: 0.1400 inches (3.556 mm)
- Part Type: Taper bearing cone
- Compatible with Chevrolet 3500 and Ram P30 models
Detailed Product Description
The National 39585 is a taper bearing cone specifically designed for wheel bearing assemblies in select Chevrolet and Ram vehicles. With a cone bore measuring 2.5 inches (63.5 mm) and a cone length of approximately 1.19 inches (30.163 mm), this component fits precisely within the wheel hub to support rotational movement and reduce friction. The cone radius of 0.14 inches (3.556 mm) ensures proper seating and load distribution within the bearing assembly. This part is essential for maintaining the integrity of the driveline and axle system, contributing to smooth wheel rotation and vehicle stability.
Applications and Problem Resolution
This National wheel bearing cone is compatible with Chevrolet 3500 and Ram P30 models, making it suitable for maintenance and repair of these vehicles' driveline systems. It addresses common issues such as:
- Excessive wheel bearing play or looseness
- Noise or roughness during wheel rotation
- Premature bearing wear due to improper fit
- Vibration or instability at the wheel hub
- Seal leakage caused by worn bearing components
Installation Notes and Tips
- Ensure the wheel hub and bearing surfaces are clean and free of debris before installation.
- Verify the cone bore and length dimensions match the vehicle specifications.
- Use proper tools to press the bearing cone into place without damaging the component.
- Apply recommended lubricants to the bearing surfaces to reduce friction and wear.
- Check for correct preload and bearing adjustment after installation.
Quality Assurance and Warranty
National wheel bearing cones are manufactured to meet industry standards for durability and precision. The 39585 part number undergoes rigorous quality control to ensure consistent performance in Chevrolet 3500 and Ram P30 applications. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support long-term reliability.
| Brand | National |
| Part Number | 39585 |
| Cone Bore (Inch) | 2.5000 |
| Cone Bore (MM) | 63.5000 |
| Cone Length (Inch) | 1.1875 |
| Cone Length (MM) | 30.1630 |
| Cone Radius (Inch) | 0.1400 |
| Cone Radius (MM) | 3.5560 |
| Part Description | Taper Bearing Cone |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2022 | Ram | 3500 | Rear Outer | |
| 1999 | Chevrolet | P30 | Rear Inner | Fits with Spicer 80 Axle. |
| 1998 | Chevrolet | P30 | Rear Inner | Fits with Spicer 80 Axle. |
| 1997 | Chevrolet | P30 | Rear Inner | Fits with Spicer 80 Axle. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.