What is the bolt pattern for RAM 2500?
The RAM 2500 uses an eight-lug bolt pattern on a 6.5-inch diameter circle (8x6.5 inches / 165.1 mm). This configuration is standard across most model years and trims, designed for heavy-duty use.
In practice, the 8-lug, 6.5-inch pattern means you should look for wheels labeled 8x6.5" if you want to replace factory wheels, and you may encounter some aftermarket wheels or adapters that are compatible, but you should verify fitment for lug count, bolt circle, center bore, and offset.
Bolt pattern specifics and what it means for wheels
When shopping for wheels or upgrading tires, knowing the bolt pattern helps ensure proper mounting, safe torque, and proper seat of the wheel. Here are the key details:
- Lug nut count: 8
- Bolt circle diameter: 6.5 inches (165.1 mm)
- Center bore: vehicle-specific; aftermarket wheels may require hub-centric rings if the bore differs
- Wheel compatibility: standard for RAM 2500 heavy-duty; some aftermarket wheels advertise 8x165 but verify exact fitment for your year and trim
Before selecting wheels, confirm the following details to ensure proper fitment and safety:
Note: Avoid using unverified adapters or spacers to change lug patterns, as they can compromise safety and warranty. Confirm fitment with the wheel manufacturer or a RAM dealership.
Model-year coverage and variations
Consistency across generations
From the late 1990s through the current generation, the RAM 2500 (and other heavy-duty Ram 2500/3500 chassis) commonly uses the 8x6.5" bolt pattern. Some very early or special edition variants may vary, but the standard for mainstream RAM 2500 vehicles remains 8 on 6.5 inches.
To ensure accuracy for your specific vehicle, check the owner's manual, the door placard, or contact RAM customer support with your VIN. You can also verify by measuring the lug circle on an existing wheel or by referencing the wheel specification from the wheel manufacturer.
Summary
In short, RAM 2500 trucks use an eight-lug bolt pattern on a 6.5-inch bolt circle (8x6.5" or 165.1 mm). This pattern has been the standard across most RAM 2500 model years, making wheel compatibility straightforward for factory replacements and a wide range of aftermarket options, provided you confirm center bore and offset for your exact vehicle.
Always verify fitment for your specific year and trim, and consult a professional if you're unsure about wheel compatibility or using adapters. A precise fit ensures safe operation and preserves wheel alignment and brake clearances.
What is the bolt pattern on a Dodge Ram 2500?
The Dodge Ram 2500 has a bolt pattern of 8x6.5 inches (or 8x165.1 mm) for most model years, with a key change occurring in 2019. The 2019 and newer models have a different bolt pattern, 8x200mm, while the 2018 and older models use the 8x6.5 inch pattern.
Dodge Ram 2500 bolt patterns by year
- 2019 and newer: 8×2008 cross 2008×200 mm.
- 2018 and older: 8×6.58 cross 6.58×6.5 inches (8×165.18 cross 165.18×165.1 mm).
Important considerations when changing wheels
- Correct pattern: Always verify the bolt pattern is correct for your specific year of truck before buying new wheels.
- Wheel and tire size: In addition to the bolt pattern, you should also check the wheel diameter, width, and offset to ensure proper fitment.
- Clearance: The wheel offset is crucial for proper clearance with the brakes and suspension.
Are 8x6.5 and 8x165 the same?
Yes, "8x165" and "8x6.5" refer to the same bolt pattern, as 165.1 millimeters is equal to 6.5 inches. The notation 8x165 uses millimeters, while 8x6.5 uses inches, but they both describe a wheel with eight lug holes spaced in a circle that measures 165.1 mm or 6.5 inches across.
- 8x165: This notation uses millimeters to measure the bolt circle diameter.
- 8x6.5: This notation uses inches to measure the bolt circle diameter.
- Conversion: 165.1 mm≈6.5 inches165.1 mm is approximately equal to 6.5 inches165.1 mm≈6.5 inches.
- Compatibility: Wheels designed for an 8x165 bolt pattern will fit on a vehicle with an 8x6.5 bolt pattern, and vice versa.
When did RAM switch to 8x200 bolt pattern?
Bolt Pattern Chart
| TRUCK | YEAR | BOLT CIRCLE |
|---|---|---|
| Dodge Ram 1-ton Pickup (Single & Dual) | 94-11 | 8X6.5 |
| Dodge Ram 1-ton Pickup (Single & Dual) | 12-18 | 8X6.5 |
| Dodge Ram 1-ton Pickup (Single & Dual) | 19-Current | 8X200mm |
| Ford 1/2-ton Pickup (F-150) | 59-96 | 5X5.5 |
What is the bolt pattern on a 2018 RAM 2500?
The 2018 Ram 2500 has an 8x6.5-inch (or 8x165.1 mm) bolt pattern. This is a common 8-lug bolt pattern that is also shared with many other Ram 2500 and 3500 models from 2011 to 2025.
- Bolt Pattern: 8x6.5" or 8x165.1mm
- Lug Count: 8 lugs
- Compatibility: This pattern is also used on Ram 2500 and 3500 models from 2011 and newer.
