1999 Isuzu Oasis 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 Oasis, 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.
1999 Oasis — Year-Specific Fitment Context
The 1999 model year is the final year of the Isuzu Oasis's 6x139.7 bolt pattern run (since 1996). Wheels from any 1996–1999 Isuzu Oasis are cross-compatible with the 1999 model.
Isuzu Oasis Bolt Pattern by Year
The table below shows how the Oasis's wheel specifications have changed over the years. The 1999 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 1999 Isuzu Oasis
For the 1999 Isuzu Oasis, the 6x139.7 bolt pattern and 100.1mm center bore are critical. Aftermarket wheels often have a larger center bore (e.g., 108mm), requiring hub-centric rings to prevent vibration and ensure proper load transfer. The factory offset is 38mm; deviations beyond ±5mm may cause rubbing or clearance issues. Always use lug nuts with the correct 12x1.5 thread pitch and a 60-degree conical seat—ball-seat or shank-style nuts can loosen. Re-torque after 50-100 miles. Note: 1996-1999 Oasis wheels are interchangeable, but verify offset and bore for non-OEM options.
Historical Fitment Data Reference
In our dataset, Isuzu Oasis appears from 1996 to 1999 (4 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
- ✅ Use hub-centric rings if aftermarket wheels have a bore larger than 100.1mm to avoid vibration.
- ✅ Stick to offsets between 33mm and 43mm to prevent tire rubbing on suspension or fenders.
- ✅ Always re-torque lug nuts to 85-95 ft-lbs after 50-100 miles of driving.
- ⚠️ 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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1999 Isuzu Oasis — Frequently Asked Questions
What is the bolt pattern for a 1999 Isuzu Oasis?
The 1999 Isuzu Oasis 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 Oasis have the same bolt pattern as the 1999?
The Isuzu Oasis uses the 6x139.7 pattern from 1996 through 1999. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
What does 38mm offset mean for the 1999 Oasis?
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.
How do I measure the bolt pattern on my 1999 Isuzu?
The 1999 Oasis 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.
What lug nut size does the 1999 Isuzu Oasis use?
The 1999 Isuzu Oasis uses 12x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
What is the PCD for a 1999 Isuzu Oasis?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Oasis, the PCD is 6x139.7.
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