When did Ford use 8x170 bolt pattern?
Origins and adoption
The 8x170 bolt circle was introduced alongside Ford's relaunch of the heavy‑duty lineup in 1999, aligning with the F-250/F-350 Super Duty’s expanded axle and braking systems and enabling broader wheel and brake options. The Excursion, built on a related platform, shared the same lug pattern during its production run.
Key milestones and model pairings associated with the 8x170 pattern are listed below.
- 1999 model year: Introduction of the 8x170 lug pattern with the redesigned F‑250/F‑350 Super Duty and the long‑wheelbase Excursion.
- 1999–2005: Ford Excursion continues to use 8x170; Super Duty trucks across generations maintain the pattern.
- 2000s–2010s: The Super Duty line evolves through multiple generations, consistently retaining 8x170 lug spacing.
- 2017–present: The redesigned 2017+ Super Duty maintains 8x170, with OEM and aftermarket wheel options widely available.
- As of the 2024 model year: 8x170 remains the standard lug pattern for F‑250/F‑350 Super Duty in the United States and many international markets.
The pattern’s longevity reflects Ford’s emphasis on compatibility across generations of heavy‑duty trucks and related platforms. Still, buyers should verify year‑specific specifications for exact configurations, especially when mixing OEM wheels with aftermarket options.
Current usage and compatibility
Today, Ford’s F‑250/F‑350 Super Duty trucks largely rely on the 8x170 bolt circle, which underpins compatibility with a wide range of wheels, spacers, and adapters. The Excursion, though out of production since 2005, remains a reference point for historical wheel compatibility with this lug pattern.
When selecting wheels or adapters for a vehicle with an 8x170 pattern, consider these practical factors:
- Confirm the exact bolt circle and lug count for your model year and trim; ensure the wheel is labeled 8x170 and fits your hub bore.
- Check brake caliper and rotor clearance to accommodate wheel width and offset, especially with oversized aftermarket wheels.
- Match wheel offset and backspacing to avoid rubbing and to preserve steering geometry and suspension clearance.
- Verify load rating, center bore compatibility, and torque specifications to ensure safe installation.
In practice, these considerations help ensure that aftermarket wheels, spacers, or conversions fit cleanly without interfering with braking components or fender clearance.
Summary
Ford introduced the 8x170 lug pattern with its 1999 Super Duty redesign, and the pattern has remained standard on F‑250/F‑350 Super Duty trucks through 2024, as well as on the Excursion during its 1999–2005 production window. For owners and buyers today, 8x170 compatibility remains a central factor in wheel selection, with broad aftermarket support—so long as year‑specific specifications are verified.
What is the bolt pattern on a 1997 Ford F350?
The 1997 Ford F-350 has an 8x6.5 inch (or 8x165.1mm) bolt pattern. This is the final year that Ford used this older bolt pattern before switching to the 8x170mm pattern for the 1999 model year Super Duty trucks.
- Bolt Pattern: 8x6.5 inches or 8x165.1mm.
- Model Year: 1997 is the last year for this pattern, which was used on previous generation F-Series trucks as well.
- 1999+ Models: The bolt pattern changed to 8x170mm for the 1999 and newer Super Duty trucks. You would need adapters or different axles to fit newer wheels on a 1997 model.
When did Ford change from 8x6.5 to 8x170?
1999
Ford , GM, dodge all had 8x6. 5 bolt pattern from pre 1980 all the way until 1999 and that's when ford changed to 8x170.
What year do Fords have an 8x170 bolt pattern?
The 8x170 bolt pattern is found on Ford F-250, F-350 Super Duty trucks, and some E-Series vans from 1999 to the present. This pattern was introduced in 1999 and continued through the most recent models, while older Ford trucks (like F-250s and F-350s before 1999) have a different bolt pattern, such as 8x6.5.
- Years: 1999-present
- Applicable models: Ford F-250, F-350 Super Duty trucks
- Other applicable models: Select Ford E-Series vans (E-250 and E-350)
What truck has an 8x170 lug pattern?
The 8x170 lug pattern is primarily used on heavy-duty Ford trucks, including the Ford F-250, F-350, and Excursion from 1999 to the present. It is also found on other Ford models like the E-250 and E-350.
- Ford F-250 and F-350: 1999 and newer models use the 8x170 pattern.
- Ford Excursion: The full-size SUV from 1999-2005 uses this bolt pattern.
- Ford E-Series Vans: Some E-250 and E-350 models from 1999 onwards are equipped with the 8x170 pattern.
- Note: This pattern is distinct from the 8x6.5 (8x165.1mm) pattern used on older Ford trucks or other manufacturers' trucks.
