1998 Chevrolet 3500 Extended 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 Chevrolet 3500 Extended 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 3500 Extended Cab — Year-Specific Fitment Context
The 1998 Chevrolet 3500 Extended Cab is in year 7 of 9 using the 8x165.1 pattern (1992–2000). Wheels from any 1992–2000 Chevrolet 3500 Extended Cab are cross-compatible with the 1998 model.
Chevrolet 3500 Extended Cab Bolt Pattern by Year
The table below shows how the 3500 Extended 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 Chevrolet 3500 Extended Cab
For the 1998 Chevrolet 3500 Extended Cab, the 8x165.1 bolt pattern and 116.7mm center bore are critical. Aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure load is on the hub, not the lug nuts. The factory offset is 20mm; deviations affect scrub radius and clearance. Use only 14x1.5 lug nuts with the correct seat (cone or ball) to avoid loosening. Always torque to spec and re-torque after 50 miles. Cross-compatible with 1992–2000 models.
Historical Fitment Data Reference
In our dataset, Chevrolet 3500 Extended Cab appears from 1992 to 2000 (8 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: 60.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 140 ft-lbs after 50 miles of driving.
- ✅ Verify wheel bore is 116.7mm or use hub-centric rings; avoid lug-centric fitment.
- ✅ Check offset carefully: +20mm is standard; lower offset may rub suspension or fenders.
- ⚠️ 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 3500 Extended Cab — Frequently Asked Questions
What is the bolt pattern for a 1998 Chevrolet 3500 Extended Cab?
The 1998 Chevrolet 3500 Extended 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 Chevrolet 3500 Extended Cab have the same bolt pattern as the 1998?
The Chevrolet 3500 Extended Cab uses the 8x165.1 pattern from 1992 through 2000. Wheels from any of these model years are dimensionally compatible with the 1998, provided the offset and center bore also match.
What is the center bore of a 1998 Chevrolet 3500 Extended Cab?
The factory center bore (hub bore) for the 1998 Chevrolet 3500 Extended Cab is 116.7mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Do 1998 Chevrolet 3500 Extended Cabs use lug bolts or lug nuts?
The 1998 3500 Extended Cab requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
How tight should I torque the lug nuts on a 1998 Chevrolet 3500 Extended Cab?
Refer to your owner's manual for exact specs, but always tighten the 14x1.5 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
What is the PCD for a 1998 Chevrolet 3500 Extended Cab?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1998 3500 Extended Cab, the PCD is 8x165.1.
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