1998 Chevrolet 2500 HD 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 2500 HD 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 2500 HD Extended Cab — Year-Specific Fitment Context
The 1998 Chevrolet 2500 HD Extended Cab is in year 3 of 5 using the 8x165.1 pattern (1996–2000). Wheels from any 1996–2000 Chevrolet 2500 HD Extended Cab are cross-compatible with the 1998 model.
Chevrolet 2500 HD Extended Cab Bolt Pattern by Year
The table below shows how the 2500 HD 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 2500 HD Extended Cab
For your 1998 Chevrolet 2500 HD Extended Cab, the 8x165.1 bolt pattern is shared across 1996–2000 models, ensuring cross-compatibility. However, the 116.7mm center bore is critical: aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load distribution. The offset is sensitive; stock is around 20mm, but deviations beyond ±10mm may cause rubbing or clearance issues. Always verify lug nut thread pitch (14x1.5) and seat type—use conical (60-degree) or ball seat nuts as specified. Mismatched seats can lead to wheel loosening. Safety first: consult a professional if unsure.
Historical Fitment Data Reference
In our dataset, Chevrolet 2500 HD Extended Cab appears from 1996 to 2000 (5 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 after 50–100 miles of driving to maintain clamping force.
- ✅ Avoid using universal fit wheels without hub-centric rings; they can cause vibration and stud failure.
- ✅ Check wheel backspacing; for this model, 4.5–5 inches is typical to clear brake components.
- ⚠️ Torque lugs in a star pattern to 140 ft-lbs (190 Nm), then re-check torque after 50-100 km (30-60 miles).
Ready to upgrade or perform maintenance?
🛒 Shop Tools & Accessories on AmazonAs an Amazon Associate, I earn from qualifying purchases.
1998 Chevrolet 2500 HD Extended Cab — Frequently Asked Questions
What is the bolt pattern for a 1998 Chevrolet 2500 HD Extended Cab?
The 1998 Chevrolet 2500 HD 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 2500 HD Extended Cab have the same bolt pattern as the 1998?
The Chevrolet 2500 HD Extended Cab uses the 8x165.1 pattern from 1996 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 2500 HD Extended Cab?
The factory center bore (hub bore) for the 1998 Chevrolet 2500 HD 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 2500 HD Extended Cabs use lug bolts or lug nuts?
The 1998 2500 HD Extended Cab requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Will wheels from another Chevrolet fit my 1998 2500 HD Extended Cab?
Only if they share the exact same 8x165.1 bolt pattern, a compatible offset, and a center bore equal to or larger than 116.7mm.
How do I measure the bolt pattern on my 1998 Chevrolet?
The 1998 2500 HD Extended Cab uses a 8x165.1 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.
Need more vehicle fitment data?
Access our complete, raw JSON/CSV database of over 11,000+ vehicles for your next app or project.
Get the Full Dataset