2008 Isuzu i-370 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 2008 Isuzu i-370 Extended Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | 12x1.5 |
| Center Bore (CB) | 100.1 mm |
| Offset (ET) | 38 |
| Torque Specs | 80 ft-lbs (108 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
2008 i-370 Extended Cab — Year-Specific Fitment Context
The 2008 model year is the final year of the Isuzu i-370 Extended Cab's 6x139.7 bolt pattern run (since 2007). Wheels from any 2007–2008 Isuzu i-370 Extended Cab are cross-compatible with the 2008 model.
Isuzu i-370 Extended Cab Bolt Pattern by Year
The table below shows how the i-370 Extended Cab's wheel specifications have changed over the years. The 2008 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 2007 | 6x139.7 | 100.1 | 38 |
| ▸ 2008 | 6x139.7 | 100.1 | 38 |
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 2008 Isuzu i-370 Extended Cab
For your 2008 Isuzu i-370 Extended Cab, the 6x139.7 bolt pattern is shared with many GM trucks, but the 100.1mm center bore is unique. Aftermarket wheels often have a larger bore (e.g., 108mm), requiring hub-centric rings to prevent vibration and ensure proper load transfer. The 38mm offset is critical; deviations beyond ±5mm may cause rubbing on suspension or fenders. Always use 12x1.5 lug nuts with the correct seat type—conical (60-degree) for most aftermarket wheels, or ball seat for factory wheels. Mismatched seats can lead to wheel loosening. Verify thread engagement: at least 7 full turns. Re-torque after 50 miles of driving.
Historical Fitment Data Reference
In our dataset, Isuzu i-370 Extended Cab appears from 2007 to 2008 (2 model years). Across recorded model years, this model generally keeps the same bolt pattern.
- Observed bolt-pattern variants for this model: 1
- Observed center-bore variants for this model: 1
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 0.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 100 ft-lb after 50 miles of driving to account for settling.
- ✅ If using aftermarket wheels, ensure hub-centric rings match the 100.1mm hub bore to avoid vibrations.
- ✅ Check for caliper clearance with 38mm offset wheels; some aftermarket designs may require spacers.
- ⚠️ 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).
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2008 Isuzu i-370 Extended Cab — Frequently Asked Questions
What is the bolt pattern for a 2008 Isuzu i-370 Extended Cab?
The 2008 Isuzu i-370 Extended Cab uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 100.1mm and the offset is 38mm.
What other years of Isuzu i-370 Extended Cab have the same bolt pattern as the 2008?
The Isuzu i-370 Extended Cab uses the 6x139.7 pattern from 2007 through 2008. Wheels from any of these model years are dimensionally compatible with the 2008, provided the offset and center bore also match.
Do 2008 Isuzu i-370 Extended Cabs use lug bolts or lug nuts?
The 2008 i-370 Extended Cab requires 12x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
How do I measure the bolt pattern on my 2008 Isuzu?
The 2008 i-370 Extended Cab uses a 6x139.7 pattern. For 4, 6, or 8-lug wheels, measure center-to-center across opposite holes. For 5-lug, measure from the center of one hole to the back of the opposite hole.
Will wheels from another Isuzu fit my 2008 i-370 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 100.1mm.
What does 38mm offset mean for the 2008 i-370 Extended Cab?
An offset of 38mm means the wheel's mounting surface is 38mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Isuzu.
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