2021 Ford Bronco Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2021 Ford Bronco, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | 12x1.5 |
| Center Bore (CB) | 93.1 mm |
| Offset (ET) | 55 |
| Torque Specs | 80 ft-lbs (108 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
2021 Bronco — Year-Specific Fitment Context
The 2021 model year marks the beginning of the Ford Bronco's 6x139.7 bolt pattern era, which continued through 2024 (4 consecutive years). Wheels from any 2021–2024 Ford Bronco are cross-compatible with the 2021 model. Across its full production run (1992–2024), the Bronco has also used: 5x139.7.
Ford Bronco Bolt Pattern by Year
The table below shows how the Bronco's wheel specifications have changed over the years. The 2021 model year is highlighted.
6x139.7 Pattern Context
This bolt pattern appears on 1067 vehicles in our current database and is considered common.
Examples of other vehicles using 6x139.7:
Expert Buying Guide for 2021 Ford Bronco
For your 2021 Ford Bronco, the 6x139.7 bolt pattern is shared with 2021–2024 models, ensuring cross-compatibility. However, the 93.1mm center bore is critical: aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. Offset sensitivity is high; the factory 55mm offset maintains suspension geometry and tire clearance. Deviating more than ±10mm may cause rubbing or bearing stress. Always use the correct 12x1.5 lug nuts with a conical (60-degree) seat—never ball seat—to avoid wheel loosening. Re-torque after 50–100 miles of driving.
Historical Fitment Data Reference
In our dataset, Ford Bronco appears from 1992 to 2024 (9 model years). Across model years, this model appears with 2 bolt patterns (5x139.7, 6x139.7).
- Observed bolt-pattern variants for this model: 2
- Observed center-bore variants for this model: 2
- Observed lug-size variants for this model: 2
- Observed total offset span across years: 55.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 150 lb-ft after 50–100 miles of driving to account for settling.
- ✅ If using aftermarket wheels, verify hub bore and use hub-centric rings (93.1mm ID to wheel bore OD) to avoid vibrations.
- ✅ Avoid spacers unless hub-centric and paired with extended studs; improper fitment can lead to wheel separation.
- ⚠️ Verify thread pitch before installation; M12x1.25 and M12x1.5 are not interchangeable.
- ⚠️ Torque lugs in a star pattern to 80 ft-lbs (108 Nm), then re-check torque after 50-100 km (30-60 miles).
- ⚠️ This model has multiple bolt-pattern records across years. Match wheels to exact year/trim before purchase.
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2021 Ford Bronco — Frequently Asked Questions
What is the bolt pattern for a 2021 Ford Bronco?
The 2021 Ford Bronco uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 93.1mm and the offset is 55mm.
What other years of Ford Bronco have the same bolt pattern as the 2021?
The Ford Bronco uses the 6x139.7 pattern from 2021 through 2024. Wheels from any of these model years are dimensionally compatible with the 2021, provided the offset and center bore also match.
Why is matching the 93.1mm center bore important for the 2021 Bronco?
The 93.1mm center bore ensures the wheel is perfectly centered on the hub. If the wheel is lug-centric instead of hub-centric, you may experience steering wheel vibration at highway speeds.
How tight should I torque the lug nuts on a 2021 Ford Bronco?
Refer to your owner's manual for exact specs, but always tighten the 12x1.5 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
What is the center bore of a 2021 Ford Bronco?
The factory center bore (hub bore) for the 2021 Ford Bronco is 93.1mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
What is the PCD for a 2021 Ford Bronco?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 2021 Bronco, the PCD is 6x139.7.
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