1998 Dodge Ram 3500 Quad 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 Dodge Ram 3500 Quad Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 8x165.1 (8x6.5") |
|---|---|
| Lug Nut / Bolt Size | 9/16 |
| Center Bore (CB) | 121.3 mm |
| Offset (ET) | 43 |
| Torque Specs | 140 ft-lbs (190 Nm) |
1998 Ram 3500 Quad Cab — Year-Specific Fitment Context
The 1998 model year marks the beginning of the Dodge Ram 3500 Quad Cab's 8x165.1 bolt pattern era, which continued through 2009 (12 consecutive years). Wheels from any 1998–2009 Dodge Ram 3500 Quad Cab are cross-compatible with the 1998 model.
Dodge Ram 3500 Quad Cab Bolt Pattern by Year
The table below shows how the Ram 3500 Quad Cab's wheel specifications have changed over the years. The 1998 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| ▸ 1998 | 8x165.1 | 121.3 | 43 |
| 1999 | 8x165.1 | 121.3 | 43 |
| 2000 | 8x165.1 | 121.3 | 43 |
| 2001 | 8x165.1 | 121.3 | 43 |
| 2002 | 8x165.1 | 121.3 | 43 |
| 2003 | 8x165.1 | 121.3 | 43 |
| 2004 | 8x165.1 | 121.3 | 43 |
| 2005 | 8x165.1 | 121.3 | 43 |
| 2006 | 8x165.1 | 121.3 | 43 |
| 2007 | 8x165.1 | 121.3 | 43 |
| 2008 | 8x165.1 | 121.3 | 43 |
| 2009 | 8x165.1 | 121.3 | 43 |
Fitment Notes
The 1998 Dodge Ram 3500 Quad Cab has a bolt pattern of 8x165.1.
Imperial Conversion: This bolt pattern is commonly referred to as 8x6.5" in imperial units. When searching for aftermarket wheels, you may see them listed as 8x6.5".
This means it is a 8 lug pattern with a circle diameter of 165.1mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, Dodge Ram 3500 Quad Cab appears from 1998 to 2009 (12 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
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:
1998 Dodge Ram 3500 Quad Cab — Frequently Asked Questions
What is the bolt pattern for a 1998 Dodge Ram 3500 Quad Cab?
The 1998 Dodge Ram 3500 Quad Cab uses a 8x165.1 bolt pattern (also called lug pattern or PCD). The center bore is 121.3mm and the offset is 43mm.
What other years of Dodge Ram 3500 Quad Cab have the same bolt pattern as the 1998?
The Dodge Ram 3500 Quad Cab uses the 8x165.1 pattern from 1998 through 2009. Wheels from any of these model years are dimensionally compatible with the 1998, provided the offset and center bore also match.
Why is matching the 121.3mm center bore important for the 1998 Ram 3500 Quad Cab?
The 121.3mm 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.
What is the center bore of a 1998 Dodge Ram 3500 Quad Cab?
The factory center bore (hub bore) for the 1998 Dodge Ram 3500 Quad Cab is 121.3mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Can I use spacers on my 1998 Dodge Ram 3500 Quad Cab?
Yes, but ensure the wheel spacers match the 8x165.1 bolt pattern and 121.3mm center bore. Also verify that you have enough thread engagement for your 9/16 hardware.
What is the factory wheel offset for a 1998 Dodge Ram 3500 Quad Cab?
The OEM offset for the 1998 Ram 3500 Quad Cab is typically around 43mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
Fitment Checklist Before You Buy Wheels
- Torque lugs in a star pattern to 140 ft-lbs (190 Nm), then re-check torque after 50-100 km (30-60 miles).
Editorial Fitment Notes
Dodge Ram 3500 Quad Cab is generally consistent in bolt-pattern records across model years, but offset and hardware should still be validated before purchase.
- Observed production years in our database: 1998-2009 (12 model years).
- Observed bolt-pattern variants: 1 (8x165.1).
- Observed total offset span across years: 0.0 mm.
- Observed center-bore variants: 1 | lug-size variants: 1.
Data Quality & Review
Source note: Compiled from manufacturer fitment references, historical wheel data, and internal normalization rules.
Last reviewed: 2026-05-26 | Reviewed by: Bolt Pattern HQ Editorial Team
If you find a discrepancy for 1998 Dodge Ram 3500 Quad Cab, please report it via our About page contact so we can verify and update this record.