1998 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 1998 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) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
1998 Trooper — Year-Specific Fitment Context
The 1998 Isuzu Trooper is in year 7 of 11 using the 6x139.7 pattern (1992–2002). Wheels from any 1992–2002 Isuzu Trooper are cross-compatible with the 1998 model.
Isuzu Trooper Bolt Pattern by Year
The table below shows how the Trooper's wheel specifications have changed over the years. The 1998 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 1998 Isuzu Trooper
The 1998 Isuzu Trooper uses a 6x139.7 bolt pattern with a 108.0mm center bore. When fitting aftermarket wheels, hub-centric rings are essential to match the bore precisely, preventing vibrations and ensuring proper load distribution. The offset is sensitive; stock is 30mm, and deviations beyond ±10mm may cause rubbing or clearance issues. Always verify lug nut compatibility: the Trooper requires 12x1.50 thread pitch with a conical (60-degree) seat. Using incorrect seat type (e.g., ball seat) can lead to wheel loosening. Re-torque lug nuts after 50-100 miles of driving.
Historical Fitment Data Reference
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
Quick Tips & Safety Warnings
- ✅ Always use hub-centric rings with aftermarket wheels to match the 108.0mm center bore.
- ✅ Stick to offsets within 20-40mm range to avoid rubbing on suspension or fenders.
- ✅ Re-torque lug nuts to 100-110 ft-lbs after 50-100 miles and periodically thereafter.
- ⚠️ 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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1998 Isuzu Trooper — Frequently Asked Questions
What is the bolt pattern for a 1998 Isuzu Trooper?
The 1998 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 1998?
The Isuzu Trooper uses the 6x139.7 pattern from 1992 through 2002. Wheels from any of these model years are dimensionally compatible with the 1998, provided the offset and center bore also match.
What does 30mm offset mean for the 1998 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.
Do 1998 Isuzu Troopers use lug bolts or lug nuts?
The 1998 Trooper requires N 12x1.50 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Can I put aftermarket wheels on my 1998 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).
What is the PCD for a 1998 Isuzu Trooper?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1998 Trooper, the PCD is 6x139.7.
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