2021 Cadillac CT4 Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2021 Cadillac CT4, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x115 |
|---|---|
| Lug Nut / Bolt Size | 12x1.5 |
| Center Bore (CB) | 70.3 mm |
| Offset (ET) | 40 |
| Torque Specs | 80 ft-lbs (108 Nm) |
2021 CT4 — Year-Specific Fitment Context
The 2021 Cadillac CT4 is in year 2 of 5 using the 5x115 pattern (2020–2024). Wheels from any 2020–2024 Cadillac CT4 are cross-compatible with the 2021 model.
Cadillac CT4 Bolt Pattern by Year
The table below shows how the CT4's wheel specifications have changed over the years. The 2021 model year is highlighted.
Fitment Notes
The 2021 Cadillac CT4 has a bolt pattern of 5x115.
This means it is a 5 lug pattern with a circle diameter of 115mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, Cadillac CT4 appears from 2020 to 2024 (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
5x115 Pattern Context
This bolt pattern appears on 498 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x115:
2021 Cadillac CT4 — Frequently Asked Questions
What is the bolt pattern for a 2021 Cadillac CT4?
The 2021 Cadillac CT4 uses a 5x115 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 40mm.
What other years of Cadillac CT4 have the same bolt pattern as the 2021?
The Cadillac CT4 uses the 5x115 pattern from 2020 through 2024. Wheels from any of these model years are dimensionally compatible with the 2021, provided the offset and center bore also match.
What does 40mm offset mean for the 2021 CT4?
An offset of 40mm means the wheel's mounting surface is 40mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Cadillac.
Will wheels from another Cadillac fit my 2021 CT4?
Only if they share the exact same 5x115 bolt pattern, a compatible offset, and a center bore equal to or larger than 70.3mm.
Can I put aftermarket wheels on my 2021 Cadillac CT4?
Absolutely. Just ensure the aftermarket wheels have a 5x115 bolt pattern, an offset near 40mm, and a center bore of at least 70.3mm (using hub rings if larger).
Why is matching the 70.3mm center bore important for the 2021 CT4?
The 70.3mm 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.
Fitment Checklist Before You Buy Wheels
- Verify thread pitch before installation; M12x1.25 and M12x1.5 are not interchangeable.
- Torque lugs in a star pattern to 80 ft-lbs (108 Nm), then re-check torque after 50-100 km (30-60 miles).
Editorial Fitment Notes
Cadillac CT4 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: 2020-2024 (5 model years).
- Observed bolt-pattern variants: 1 (5x115).
- 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 2021 Cadillac CT4, please report it via our About page contact so we can verify and update this record.