2021 Mercedes-Benz A-Class Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2021 Mercedes-Benz A-Class, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x112 |
|---|---|
| Lug Nut / Bolt Size | B 14x1.50 |
| Center Bore (CB) | 66.5 mm |
| Offset (ET) | 45 |
| Torque Specs | 100 ft-lbs (135 Nm) |
2021 A-Class — Year-Specific Fitment Context
The 2021 Mercedes-Benz A-Class is in year 3 of 4 using the 5x112 pattern (2019–2022). Wheels from any 2019–2022 Mercedes-Benz A-Class are cross-compatible with the 2021 model.
Mercedes-Benz A-Class Bolt Pattern by Year
The table below shows how the A-Class's wheel specifications have changed over the years. The 2021 model year is highlighted.
5x112 Pattern Context
This bolt pattern appears on 1490 vehicles in our current database and is considered common.
Examples of other vehicles using 5x112:
Expert Buying Guide for 2021 Mercedes-Benz A-Class
For your 2021 Mercedes-Benz A-Class, the 5x112 bolt pattern and 66.5mm center bore are critical. Aftermarket wheels often have a larger center bore (e.g., 66.6mm or 72.6mm), requiring hub-centric rings to prevent vibrations and ensure proper load transfer. The offset is sensitive: stock is 45mm; deviations beyond ±5mm may cause rubbing or clearance issues with suspension and brakes. Always use the correct lug nuts: B 14x1.50 thread pitch with a ball seat (Mercedes-specific). Using improper lug nuts (e.g., conical seat) can lead to wheel loosening. Verify wheel load rating meets or exceeds vehicle specifications. Wheels from 2019–2022 A-Class models are direct fit.
Historical Fitment Data Reference
In our dataset, Mercedes-Benz A-Class appears from 2019 to 2022 (4 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: 2
- Observed lug-size variants for this model: 2
- Observed total offset span across years: 95.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts after 50 miles of driving to ensure proper seating.
- ✅ Avoid using universal fit wheels without hub-centric rings; vibrations may occur.
- ✅ Check brake caliper clearance when changing offset; 45mm is safe, but lower offsets may require spacers.
- ⚠️ Confirm bolt pattern carefully. 5x112 is often confused with other common 5-lug patterns.
- ⚠️ 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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2021 Mercedes-Benz A-Class — Frequently Asked Questions
What is the bolt pattern for a 2021 Mercedes-Benz A-Class?
The 2021 Mercedes-Benz A-Class uses a 5x112 bolt pattern (also called lug pattern or PCD). The center bore is 66.5mm and the offset is 45mm.
What other years of Mercedes-Benz A-Class have the same bolt pattern as the 2021?
The Mercedes-Benz A-Class uses the 5x112 pattern from 2019 through 2022. Wheels from any of these model years are dimensionally compatible with the 2021, provided the offset and center bore also match.
Can I put aftermarket wheels on my 2021 Mercedes-Benz A-Class?
Absolutely. Just ensure the aftermarket wheels have a 5x112 bolt pattern, an offset near 45mm, and a center bore of at least 66.5mm (using hub rings if larger).
What lug nut size does the 2021 Mercedes-Benz A-Class use?
The 2021 Mercedes-Benz A-Class uses B 14x1.50 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
Why is matching the 66.5mm center bore important for the 2021 A-Class?
The 66.5mm 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 is the factory wheel offset for a 2021 Mercedes-Benz A-Class?
The OEM offset for the 2021 A-Class is typically around 45mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
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