2018 Ram 1500 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 2018 Ram 1500 Regular 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.
2018 1500 Regular Cab — Year-Specific Fitment Context
The 2018 model year is the final year of the Ram 1500 Regular Cab's 5x139.7 bolt pattern run (since 2011). Wheels from any 2011–2018 Ram 1500 Regular Cab are cross-compatible with the 2018 model.
Ram 1500 Regular Cab Bolt Pattern by Year
The table below shows how the 1500 Regular Cab's wheel specifications have changed over the years. The 2018 model year is highlighted.
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 2018 Ram 1500 Regular Cab
For your 2018 Ram 1500 Regular Cab, the 5x139.7 bolt pattern and 77.8mm center bore are critical. Aftermarket wheels often have a larger center bore (e.g., 78.1mm), requiring hub-centric rings to prevent vibration and ensure load is on the hub, not the lugs. Offset is sensitive: the factory 19mm offset is ideal for clearance and scrub radius. Sticking within ±6mm is recommended to avoid rubbing or bearing stress. Always use the correct 9/16" lug nuts with the proper seat (cone or ball) matching the wheel; mismatched seats can cause loosening. Re-torque after 50-100 miles.
Historical Fitment Data Reference
In our dataset, Ram 1500 Regular Cab appears from 2011 to 2018 (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: 0.0 mm
Quick Tips & Safety Warnings
- ✅ Use hub-centric rings if aftermarket wheels have a bore larger than 77.8mm to prevent vibration.
- ✅ Stick to offset within 13-25mm to maintain proper clearance and avoid suspension interference.
- ✅ Re-torque lug nuts to 130-140 ft-lbs after 50-100 miles of driving.
- ⚠️ 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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2018 Ram 1500 Regular Cab — Frequently Asked Questions
What is the bolt pattern for a 2018 Ram 1500 Regular Cab?
The 2018 Ram 1500 Regular 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 Ram 1500 Regular Cab have the same bolt pattern as the 2018?
The Ram 1500 Regular Cab uses the 5x139.7 pattern from 2011 through 2018. Wheels from any of these model years are dimensionally compatible with the 2018, provided the offset and center bore also match.
Will wheels from another Ram fit my 2018 1500 Regular Cab?
Only if they share the exact same 5x139.7 bolt pattern, a compatible offset, and a center bore equal to or larger than 77.8mm.
How tight should I torque the lug nuts on a 2018 Ram 1500 Regular 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.
What lug nut size does the 2018 Ram 1500 Regular Cab use?
The 2018 Ram 1500 Regular Cab uses 9/16 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
What is the center bore of a 2018 Ram 1500 Regular Cab?
The factory center bore (hub bore) for the 2018 Ram 1500 Regular Cab is 77.8mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
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