What is the bolt pattern on a super duty dually?
The bolt pattern for a Ford Super Duty dual-rear-wheel truck is eight lugs on a 170 mm circle (8x170).
Bolt pattern basics
A bolt pattern identifies how many lug studs a wheel hub has and the diameter of the circle those studs form. For most Ford F-Series Super Duty trucks equipped with dual rear wheels, the standard pattern is eight lugs arranged on a 170 millimeter circle, commonly written as 8x170 (equivalently 8x6.69 inches).
Scope of use
This 8x170 pattern applies to the majority of 1999–present Ford F-250, F-350, F-450 and related dual-rear-wheel configurations. There are rare exceptions among older models or special editions, so always verify for your exact year and trim.
How to verify your specific truck
To confirm the bolt pattern on your vehicle, you can measure directly or consult official documentation. Accurate verification helps ensure wheels, spacers, and adapters fit correctly.
Measurement steps
1) Count the number of lug holes on the hub or wheel (most Super Duty duallies have eight). 2) Measure the bolt circle diameter by locating the centers of opposite lug holes and measuring across the circle. 3) Convert to millimeters or inches as needed; compare to standard patterns (8x170 mm or 8x6.69 in).
Exceptions and notes
If you are purchasing wheels or a hub kit, check the wheel manufacturer’s specifications, the owner’s manual, or Ford's VIN-specific data to rule out any year-specific variations. Rare cases may exist in older fleets or specialty builds.
Summary
In most cases, a Ford Super Duty dually uses an 8x170 bolt pattern. Always verify your exact year and model before buying wheels or running adapters to ensure a proper fit.
When did Ford go to the 8x200 bolt pattern?
Bolt Pattern Chart
| TRUCK | YEAR | BOLT CIRCLE |
|---|---|---|
| Ford 1-Ton Pickup Dual Wheel (F-350) | 98-02 | 8X170mm |
| Ford 1-Ton Pickup Dual Wheel (F-350) | 03-04 | 8X170mm |
| Ford 1-Ton Pickup Dual Wheel (F-350) | 05-Current | 8X200mm |
| International 1/2-ton Pickup | 69-75 | 5X5.5 |
Is 8X6.5 and 8x165 the same lug pattern?
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.
What trucks have a 6x120 bolt pattern?
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What is the bolt pattern on a Ford F350 dually?
The Ford F-350 dually lug pattern is 8x200 for most models from 2005 to the present. Older dually models, specifically the 1997 model year "new body style," use the 8x170 bolt pattern, while the "old body style" 1997 models use 8x6.5. It's crucial to verify the exact lug pattern for your specific truck year to ensure compatibility when buying new wheels.
This video explains how to determine the correct lug pattern for your vehicle: 35sBuyTruckWheels.comYouTube · Jul 4, 2025
- Most Common (2005-Present): The standard lug pattern for most F-350 dually models in this range is 8x200.
- Older Models:
- 1997 (new body style): Uses 8x170.
- 1997 (old body style): Uses 8x6.5.
- Important: Always confirm the lug pattern for your specific truck year before purchasing new wheels to ensure they will fit correctly.
