What lug pattern is a 1999 7.3 powerstroke?
For the 1999 Ford F-250 and F-350 Super Duty equipped with the 7.3-liter Power Stroke, the lug pattern is eight lugs on a 170 mm bolt circle (8x170).
This lug pattern is associated with Ford's heavy-duty F-Series from that era and affects wheel compatibility across SRW and DRW configurations. When buying wheels or tires, verify the bolt circle, hub bore, and offset to ensure proper fitment on your specific truck.
Pattern specification for the 1999 Super Duty
Key details you should know about this lug pattern:
- Number of lug studs: 8
- Bolt circle diameter: 170 mm (6.69 inches)
- Common vehicle applications: Ford F-250 and F-350 Super Duty models roughly 1999–2004
- Notes: This is the standard heavy-duty pattern for that era; verify against your exact vehicle to account for any exceptions.
With this configuration, wheels and hub assemblies are designed to handle the higher loads associated with Ford's heavy-duty pickups, including both SRW and DRW variants.
How to verify your exact setup on your truck
To double-check your wheel fitment, consider these steps:
- Check the wheel mounting pattern on the vehicle's door placard or owner's manual.
- Measure the bolt circle by drawing an imaginary circle through the centers of the lug holes and calculating the diameter.
- Confirm hub bore size and wheel offset to ensure proper seating and clearance.
- When in doubt, consult a tire/wheel shop or Ford dealer with your VIN for definitive confirmation.
These checks help prevent mismatched wheels and ensure safe, proper fitment on the 1999 Power Stroke F-Series Super Duty.
Summary
The 1999 Ford F-250 and F-350 Super Duty with the 7.3 Power Stroke use an 8-lug wheel pattern on a 170 mm bolt circle (8x170). Always verify the exact pattern on your vehicle using the placard or VIN, and consider hub bore and offset when selecting new wheels to maintain proper fit and safety.
