2015 Ram 3500 Mega Cab Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2015 Ram 3500 Mega 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) | 121.3 mm |
| Offset (ET) | 43 |
| Torque Specs | 140 ft-lbs (190 Nm) |
2015 3500 Mega Cab — Year-Specific Fitment Context
The 2015 Ram 3500 Mega Cab is in year 5 of 14 using the 8x165.1 pattern (2011–2024). Wheels from any 2011–2024 Ram 3500 Mega Cab are cross-compatible with the 2015 model.
Ram 3500 Mega Cab Bolt Pattern by Year
The table below shows how the 3500 Mega Cab's wheel specifications have changed over the years. The 2015 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 2011 | 8x165.1 | 121.3 | 25 |
| 2012 | 8x165.1 | 121.3 | 43 |
| 2013 | 8x165.1 | 121.3 | 43 |
| 2014 | 8x165.1 | 121.3 | 43 |
| ▸ 2015 | 8x165.1 | 121.3 | 43 |
| 2016 | 8x165.1 | 121.3 | 43 |
| 2017 | 8x165.1 | 121.3 | 43 |
| 2018 | 8x165.1 | 121.3 | 43 |
| 2019 | 8x165.1 | 121.3 | 43 |
| 2021 | 8x165.1 | 121.3 | 43 |
| 2022 | 8x165.1 | 121.3 | 43 |
| 2024 | 8x165.1 | 121.3 | 43 |
Fitment Notes
The 2015 Ram 3500 Mega 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, Ram 3500 Mega Cab appears from 2011 to 2024 (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: 2
- Observed total offset span across years: 18.0 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:
2015 Ram 3500 Mega Cab — Frequently Asked Questions
What is the bolt pattern for a 2015 Ram 3500 Mega Cab?
The 2015 Ram 3500 Mega 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 Ram 3500 Mega Cab have the same bolt pattern as the 2015?
The Ram 3500 Mega Cab uses the 8x165.1 pattern from 2011 through 2024. Wheels from any of these model years are dimensionally compatible with the 2015, provided the offset and center bore also match.
What does 43mm offset mean for the 2015 3500 Mega Cab?
An offset of 43mm means the wheel's mounting surface is 43mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Ram.
What is the factory wheel offset for a 2015 Ram 3500 Mega Cab?
The OEM offset for the 2015 3500 Mega Cab is typically around 43mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
Can I use spacers on my 2015 Ram 3500 Mega 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 14x1.5 hardware.
Do 2015 Ram 3500 Mega Cabs use lug bolts or lug nuts?
The 2015 3500 Mega Cab requires 14x1.5 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
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
Ram 3500 Mega 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: 2011-2024 (12 model years).
- Observed bolt-pattern variants: 1 (8x165.1).
- Observed total offset span across years: 18.0 mm.
- Observed center-bore variants: 1 | lug-size variants: 2.
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 2015 Ram 3500 Mega Cab, please report it via our About page contact so we can verify and update this record.