Mazda BT-50 (CD, UN) Wheel Lug Pattern, Offset & Center Bore Reference
The Mazda BT-50 (CD, UN) features a standard wheel lug pattern that varies slightly by production year but generally includes a 6 × 139.7 mm (6 lug × 139.7 mm PCD) configuration. This lug pattern is common among mid-size pickup trucks, making wheel replacements and upgrades easier to source.\n\nOffset (ET) values for the BT-50 (CD, UN) typically range between ET20 and ET40, depending on the wheel design and year model. Proper offset is critical to ensure adequate clearance for suspension components and correct wheel positioning within the wheel arches.\n\nThe center bore diameter for this vehicle is usually 106.1 mm, which aligns with many aftermarket rims designed for similar-sized pickups. Ensuring the center bore matches your wheel prevents vibrations and ensures a safe fit.\n\nCommon rim sizes for the Mazda BT-50 include 16-inch and 17-inch diameters, with widths typically ranging from 7 to 8 inches. Consult the year-specific lug pattern and offset tables to select compatible wheels that maintain optimal driving performance and safety.
| Make / model / trim | Year | Tire | Rim width (in) | Rim diam. (in) | Bolt pattern | Offset ET | Bore DIA | Mounting |
|---|---|---|---|---|---|---|---|---|
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2015 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2014 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2013 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2012 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2011 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2010 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2009 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2008 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2007 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
| Mazda BT-50 (CD, UN) 2.5 MRZ-CD 4x4 | 2006 | 235/75R15 | 7 | 15 | 6×139.7 | 10 | 93.1 | M12*1,5 |
FAQ
- What is the standard lug pattern for the Mazda BT-50 (CD, UN)?
- The standard lug pattern is 6 × 139.7 mm (6 lug nuts with a 139.7 mm pitch circle diameter).
- Why is offset (ET) important for Mazda BT-50 wheels?
- Offset ensures wheels fit correctly without rubbing suspension parts and helps maintain vehicle stability.
- What center bore size fits Mazda BT-50 (CD, UN) wheels?
- The center bore size is typically 106.1 mm, matching the hub diameter for proper wheel mounting.
Tire size calculatorShow
Compare two tire sizes — diameter, speedometer error, and clearance change.
| Size 1 | Size 2 | Diff | Diff(%) | |
|---|---|---|---|---|
| Diameter | 25.0" | 25.4" | 0.5" | 1.89% |
| Width | 7.7" | 8.5" | 0.8" | 10.26% |
| Circumference | 78.4" | 79.9" | 1.5" | 1.86% |
| Profile height | 5.0" | 4.2" | -0.7" | -15.08% |
| Turnover per mile | 807 | 793 | 14 | -1.73% |
| Clearance | - | - | +0.2" | - |






Speedometer Error
(First wheel OEM size)
| Reading | 20 mph | 30 mph | 40 mph | 50 mph | 60 mph | 70 mph | 80 mph | 90 mph |
|---|---|---|---|---|---|---|---|---|
| Actual | 20.4 | 30.5 | 40.7 | 50.9 | 61.1 | 71.2 | 81.4 | 91.6 |
