1998 GMC 2500 Regular Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1998 GMC 2500 Regular Cab, 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 2500 Regular Cab — Year-Specific Fitment Context
The 1998 model year is the final year of the GMC 2500 Regular Cab's 8x165.1 bolt pattern run (since 1992). Wheels from any 1992–1998 GMC 2500 Regular Cab are cross-compatible with the 1998 model.
GMC 2500 Regular Cab Bolt Pattern by Year
The table below shows how the 2500 Regular Cab'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 GMC 2500 Regular Cab
For your 1998 GMC 2500 Regular Cab, the 8x165.1 bolt pattern is shared with 1992-1998 models, but the 116.7mm center bore is critical. Aftermarket wheels often have larger bores; use hub-centric rings to prevent vibration and ensure load is on the hub, not the studs. Offset is sensitive: stock is 20mm. Sticking within ±10mm avoids clearance issues with brakes and suspension. Always use 14x1.5 lug nuts with proper seat type (cone or ball) matching the wheel. Incorrect thread pitch or seat can cause wheel loss. Verify lug nut torque to spec and re-torque after 50-100 miles.
Historical Fitment Data Reference
In our dataset, GMC 2500 Regular Cab appears from 1992 to 1998 (7 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 140 ft-lbs after 50-100 miles of driving.
- ✅ Avoid using aftermarket wheels without hub-centric rings; the 116.7mm bore is unique.
- ✅ Check wheel backspacing: stock is ~4.5 inches; wider tires may require spacers or offset adjustment.
- ⚠️ 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 GMC 2500 Regular Cab — Frequently Asked Questions
What is the bolt pattern for a 1998 GMC 2500 Regular Cab?
The 1998 GMC 2500 Regular Cab 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 GMC 2500 Regular Cab have the same bolt pattern as the 1998?
The GMC 2500 Regular Cab uses the 8x165.1 pattern from 1992 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 put aftermarket wheels on my 1998 GMC 2500 Regular Cab?
Absolutely. Just ensure the aftermarket wheels have a 8x165.1 bolt pattern, an offset near 20mm, and a center bore of at least 116.7mm (using hub rings if larger).
What is the PCD for a 1998 GMC 2500 Regular Cab?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1998 2500 Regular Cab, the PCD is 8x165.1.
Do 1998 GMC 2500 Regular Cabs use lug bolts or lug nuts?
The 1998 2500 Regular Cab requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Can I use spacers on my 1998 GMC 2500 Regular Cab?
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.
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