1999 Isuzu Trooper Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1999 Isuzu Trooper, 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) | 108.0 mm |
| Offset (ET) | 30 |
| Torque Specs | 80 ft-lbs (108 Nm) |
1999 Trooper — Year-Specific Fitment Context
The 1999 Isuzu Trooper is in year 8 of 11 using the 6x139.7 pattern (1992–2002). Wheels from any 1992–2002 Isuzu Trooper are cross-compatible with the 1999 model.
Isuzu Trooper Bolt Pattern by Year
The table below shows how the Trooper's wheel specifications have changed over the years. The 1999 model year is highlighted.
Fitment Notes
The 1999 Isuzu Trooper 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, Isuzu Trooper appears from 1992 to 2002 (11 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: 22.0 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:
1999 Isuzu Trooper — Frequently Asked Questions
What is the bolt pattern for a 1999 Isuzu Trooper?
The 1999 Isuzu Trooper uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 108.0mm and the offset is 30mm.
What other years of Isuzu Trooper have the same bolt pattern as the 1999?
The Isuzu Trooper uses the 6x139.7 pattern from 1992 through 2002. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
What does 30mm offset mean for the 1999 Trooper?
An offset of 30mm means the wheel's mounting surface is 30mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Isuzu.
Why is matching the 108.0mm center bore important for the 1999 Trooper?
The 108.0mm 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 1999 Isuzu Trooper?
Refer to your owner's manual for exact specs, but always tighten the N 12x1.50 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
Can I put aftermarket wheels on my 1999 Isuzu Trooper?
Absolutely. Just ensure the aftermarket wheels have a 6x139.7 bolt pattern, an offset near 30mm, and a center bore of at least 108.0mm (using hub rings if larger).
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).
Editorial Fitment Notes
Isuzu Trooper is generally consistent in bolt-pattern records across model years, but offset and hardware should still be validated before purchase.
- Observed production years in our database: 1992-2002 (11 model years).
- Observed bolt-pattern variants: 1 (6x139.7).
- Observed total offset span across years: 22.0 mm.
- Observed center-bore variants: 1 | lug-size variants: 1.
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 1999 Isuzu Trooper, please report it via our About page contact so we can verify and update this record.