1998 Chevrolet G-Series 2500 Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1998 Chevrolet G-Series 2500, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 8x165.1 (8x6.5") |
|---|---|
| Lug Nut / Bolt Size | 14x1.5 |
| Center Bore (CB) | 116.7 mm |
| Offset (ET) | 20 |
| Torque Specs | 140 ft-lbs (190 Nm) |
Imperial Match: 8x165.1 is commonly referred to as 8x6.5" in US Standard.
1998 G-Series 2500 — Year-Specific Fitment Context
The 1998 model year is the final year of the Chevrolet G-Series 2500's 8x165.1 bolt pattern run (since 1996). Wheels from any 1996–1998 Chevrolet G-Series 2500 are cross-compatible with the 1998 model.
Chevrolet G-Series 2500 Bolt Pattern by Year
The table below shows how the G-Series 2500's wheel specifications have changed over the years. The 1998 model year is highlighted.
8x165.1 Pattern Context
This bolt pattern appears on 846 vehicles in our current database and is considered common.
Examples of other vehicles using 8x165.1:
Expert Buying Guide for 1998 Chevrolet G-Series 2500
For your 1998 Chevrolet G-Series 2500, the 8x165.1 bolt pattern is shared with 1996-1998 models, but the 116.7mm center bore is critical. Aftermarket wheels often have a larger bore; use hub-centric rings to prevent vibration and ensure load is on the hub, not the lug nuts. Offset is sensitive: stock is 20mm. Deviating more than 10mm may cause rubbing or bearing stress. Always verify lug nut thread pitch (14x1.5) and seat type—factory uses cone seats. Using incorrect seats can lead to wheel loosening. Safety first: improper fitment compromises handling and braking.
Historical Fitment Data Reference
In our dataset, Chevrolet G-Series 2500 appears from 1996 to 1998 (3 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 after 50-100 miles of driving to account for settling.
- ✅ Avoid wheels with a center bore larger than 116.7mm without hub-centric rings; vibration and stud breakage can occur.
- ✅ Check for caliper clearance when changing offset; 20mm is tight, and lower offsets may require spacers or grinding.
- ⚠️ Torque lugs in a star pattern to 140 ft-lbs (190 Nm), then re-check torque after 50-100 km (30-60 miles).
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1998 Chevrolet G-Series 2500 — Frequently Asked Questions
What is the bolt pattern for a 1998 Chevrolet G-Series 2500?
The 1998 Chevrolet G-Series 2500 uses a 8x165.1 bolt pattern (also called lug pattern or PCD). The center bore is 116.7mm and the offset is 20mm.
What other years of Chevrolet G-Series 2500 have the same bolt pattern as the 1998?
The Chevrolet G-Series 2500 uses the 8x165.1 pattern from 1996 through 1998. Wheels from any of these model years are dimensionally compatible with the 1998, provided the offset and center bore also match.
Can I use spacers on my 1998 Chevrolet G-Series 2500?
Yes, but ensure the wheel spacers match the 8x165.1 bolt pattern and 116.7mm center bore. Also verify that you have enough thread engagement for your 14x1.5 hardware.
What does 20mm offset mean for the 1998 G-Series 2500?
An offset of 20mm means the wheel's mounting surface is 20mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Chevrolet.
Do 1998 Chevrolet G-Series 2500s use lug bolts or lug nuts?
The 1998 G-Series 2500 requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Why is matching the 116.7mm center bore important for the 1998 G-Series 2500?
The 116.7mm 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.
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