2020 Ram 1500 Classic Crew Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2020 Ram 1500 Classic Crew Cab, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | 14x1.5 |
| Center Bore (CB) | 77.8 mm |
| Offset (ET) | 19 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
2020 1500 Classic Crew Cab — Year-Specific Fitment Context
The 2020 Ram 1500 Classic Crew Cab is in year 2 of 5 using the 6x139.7 pattern (2019–2023). Wheels from any 2019–2023 Ram 1500 Classic Crew Cab are cross-compatible with the 2020 model.
Ram 1500 Classic Crew Cab Bolt Pattern by Year
The table below shows how the 1500 Classic Crew Cab's wheel specifications have changed over the years. The 2020 model year is highlighted.
6x139.7 Pattern Context
This bolt pattern appears on 1067 vehicles in our current database and is considered common.
Examples of other vehicles using 6x139.7:
Expert Buying Guide for 2020 Ram 1500 Classic Crew Cab
For your 2020 Ram 1500 Classic Crew Cab, the 6x139.7 bolt pattern is shared with 2019–2023 models, ensuring cross-compatibility. Critical fitment factors: center bore must be 77.8mm or larger; aftermarket wheels with larger bores require hub-centric rings to prevent vibration and load stress. Offset should stay within 19mm ±10mm to avoid rubbing or suspension interference. Always use lug nuts with 14x1.5 thread pitch and proper seat type (conical 60-degree for most aftermarket wheels, ball seat for OEM). Mismatched seats cause loose wheels and potential failure. Verify wheel load rating exceeds vehicle GVWR.
Historical Fitment Data Reference
In our dataset, Ram 1500 Classic Crew Cab appears from 2019 to 2023 (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: 0.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts after 50-100 miles of driving to ensure proper seating.
- ✅ Avoid using universal fit wheels without hub-centric rings; they can cause vibration and wheel separation.
- ✅ Check for brake caliper clearance when using wheels with offset less than 19mm, especially on lifted trucks.
- ⚠️ Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
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2020 Ram 1500 Classic Crew Cab — Frequently Asked Questions
What is the bolt pattern for a 2020 Ram 1500 Classic Crew Cab?
The 2020 Ram 1500 Classic Crew Cab uses a 6x139.7 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 Classic Crew Cab have the same bolt pattern as the 2020?
The Ram 1500 Classic Crew Cab uses the 6x139.7 pattern from 2019 through 2023. Wheels from any of these model years are dimensionally compatible with the 2020, provided the offset and center bore also match.
Can I use spacers on my 2020 Ram 1500 Classic Crew Cab?
Yes, but ensure the wheel spacers match the 6x139.7 bolt pattern and 77.8mm center bore. Also verify that you have enough thread engagement for your 14x1.5 hardware.
Why is matching the 77.8mm center bore important for the 2020 1500 Classic Crew Cab?
The 77.8mm 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 lug nut size does the 2020 Ram 1500 Classic Crew Cab use?
The 2020 Ram 1500 Classic Crew Cab uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Can I put aftermarket wheels on my 2020 Ram 1500 Classic Crew Cab?
Absolutely. Just ensure the aftermarket wheels have a 6x139.7 bolt pattern, an offset near 19mm, and a center bore of at least 77.8mm (using hub rings if larger).
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