2005 MAZDA B-Series Extended Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2005 MAZDA B-Series Extended Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | N 12x1.50 |
| Center Bore (CB) | 93.1 mm |
| Offset (ET) | 25 |
| Torque Specs | 80 ft-lbs (108 Nm) |
2005 B-Series Extended Cab — Year-Specific Fitment Context
The 2005 model year marks the beginning of the MAZDA B-Series Extended Cab's 6x139.7 bolt pattern era, which continued through 2007 (3 consecutive years). Wheels from any 2005–2007 MAZDA B-Series Extended Cab are cross-compatible with the 2005 model. Across its full production run (2005–2009), the B-Series Extended Cab has also used: 5x114.3.
MAZDA B-Series Extended Cab Bolt Pattern by Year
The table below shows how the B-Series Extended Cab's wheel specifications have changed over the years. The 2005 model year is highlighted.
Fitment Notes
The 2005 MAZDA B-Series Extended Cab has a bolt pattern of 6x139.7.
Imperial Conversion: This bolt pattern is commonly referred to as 6x5.5" in imperial units. When searching for aftermarket wheels, you may see them listed as 6x5.5".
This means it is a 6 lug pattern with a circle diameter of 139.7mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, MAZDA B-Series Extended Cab appears from 2005 to 2009 (5 model years).
Across model years, this model appears with 2 bolt patterns (5x114.3, 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: 95.0 mm
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:
2005 MAZDA B-Series Extended Cab — Frequently Asked Questions
What is the bolt pattern for a 2005 MAZDA B-Series Extended Cab?
The 2005 MAZDA B-Series Extended Cab uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 93.1mm and the offset is 25mm.
What other years of MAZDA B-Series Extended Cab have the same bolt pattern as the 2005?
The MAZDA B-Series Extended Cab uses the 6x139.7 pattern from 2005 through 2007. Wheels from any of these model years are dimensionally compatible with the 2005, provided the offset and center bore also match.
Can I use spacers on my 2005 MAZDA B-Series Extended Cab?
Yes, but ensure the wheel spacers match the 6x139.7 bolt pattern and 93.1mm center bore. Also verify that you have enough thread engagement for your N 12x1.50 hardware.
What does 25mm offset mean for the 2005 B-Series Extended Cab?
An offset of 25mm means the wheel's mounting surface is 25mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your MAZDA.
Will wheels from another MAZDA fit my 2005 B-Series Extended Cab?
Only if they share the exact same 6x139.7 bolt pattern, a compatible offset, and a center bore equal to or larger than 93.1mm.
What is the PCD for a 2005 MAZDA B-Series Extended Cab?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 2005 B-Series Extended Cab, the PCD is 6x139.7.
Fitment Checklist Before You Buy Wheels
- 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.
Editorial Fitment Notes
MAZDA B-Series Extended Cab has multiple wheel-fitment records across generations, so matching exact year and trim is important before ordering wheels.
- Observed production years in our database: 2005-2009 (5 model years).
- Observed bolt-pattern variants: 2 (5x114.3, 6x139.7).
- Observed total offset span across years: 95.0 mm.
- Observed center-bore variants: 2 | lug-size variants: 2.
Data Quality & Review
Source note: Compiled from manufacturer fitment references, historical wheel data, and internal normalization rules.
Last reviewed: 2026-05-26 | Reviewed by: Bolt Pattern HQ Editorial Team
If you find a discrepancy for 2005 MAZDA B-Series Extended Cab, please report it via our About page contact so we can verify and update this record.