1998 Dodge Ram 1500 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 1500 Quad Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x139.7 (5x5.5") |
|---|---|
| Lug Nut / Bolt Size | 9/16 |
| Center Bore (CB) | 77.8 mm |
| Offset (ET) | 19 |
| Torque Specs | 140 ft-lbs (190 Nm) |
Imperial Match: 5x139.7 is commonly referred to as 5x5.5" in US Standard.
1998 Ram 1500 Quad Cab — Year-Specific Fitment Context
The 1998 model year marks the beginning of the Dodge Ram 1500 Quad Cab's 5x139.7 bolt pattern era, which continued through 2010 (13 consecutive years). Wheels from any 1998–2010 Dodge Ram 1500 Quad Cab are cross-compatible with the 1998 model.
Dodge Ram 1500 Quad Cab Bolt Pattern by Year
The table below shows how the Ram 1500 Quad Cab's wheel specifications have changed over the years. The 1998 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| ▸ 1998 | 5x139.7 | 77.8 | 19 |
| 1999 | 5x139.7 | 77.8 | 19 |
| 2000 | 5x139.7 | 77.8 | 19 |
| 2001 | 5x139.7 | 77.8 | 19 |
| 2002 | 5x139.7 | 77.8 | 19 |
| 2003 | 5x139.7 | 77.8 | 19 |
| 2004 | 5x139.7 | 77.8 | 19 |
| 2005 | 5x139.7 | 77.8 | 19 |
| 2006 | 5x139.7 | 77.8 | 19 |
| 2007 | 5x139.7 | 77.8 | 19 |
| 2008 | 5x139.7 | 77.8 | 19 |
| 2009 | 5x139.7 | 77.8 | 19 |
| 2010 | 5x139.7 | 77.8 | 19 |
5x139.7 Pattern Context
This bolt pattern appears on 261 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x139.7:
Expert Buying Guide for 1998 Dodge Ram 1500 Quad Cab
For your 1998 Dodge Ram 1500 Quad Cab, the 5x139.7 bolt pattern is shared with 1998-2010 models, ensuring broad compatibility. However, the 77.8mm center bore is critical: aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. Offset sensitivity is high; the factory 19mm offset maintains correct scrub radius and suspension geometry. Deviating more than ±10mm may cause rubbing or handling issues. Always use the correct lug nuts: 9/16" thread with a conical (60-degree) seat. Never use ball-seat lug nuts, as they can loosen or damage the wheel. Re-torque after 50 miles of driving.
Historical Fitment Data Reference
In our dataset, Dodge Ram 1500 Quad Cab appears from 1998 to 2010 (13 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 135 ft-lbs after 50 miles, then check periodically.
- ✅ Avoid wheels with offset below 9mm (too aggressive) or above 29mm (too tucked) to prevent rubbing or brake clearance issues.
- ✅ If using aftermarket wheels, verify that the lug nut seat matches the wheel's taper (conical 60° is standard for this vehicle).
- ⚠️ 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 Dodge Ram 1500 Quad Cab — Frequently Asked Questions
What is the bolt pattern for a 1998 Dodge Ram 1500 Quad Cab?
The 1998 Dodge Ram 1500 Quad Cab uses a 5x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 77.8mm and the offset is 19mm.
What other years of Dodge Ram 1500 Quad Cab have the same bolt pattern as the 1998?
The Dodge Ram 1500 Quad Cab uses the 5x139.7 pattern from 1998 through 2010. 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 Dodge Ram 1500 Quad Cab?
The factory center bore (hub bore) for the 1998 Dodge Ram 1500 Quad Cab is 77.8mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
What does 19mm offset mean for the 1998 Ram 1500 Quad Cab?
An offset of 19mm means the wheel's mounting surface is 19mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Dodge.
How tight should I torque the lug nuts on a 1998 Dodge Ram 1500 Quad Cab?
Refer to your owner's manual for exact specs, but always tighten the 9/16 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
Can I use spacers on my 1998 Dodge Ram 1500 Quad Cab?
Yes, but ensure the wheel spacers match the 5x139.7 bolt pattern and 77.8mm center bore. Also verify that you have enough thread engagement for your 9/16 hardware.
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