2021 Audi A4 Bolt Pattern & Tire Size
The 2021 Audi A4 OEM tire size, bolt pattern, and wheel specifications are listed below. All data is based on industry-standard OEM reference specifications.
The 2021 Audi A4 has a 5x112 bolt pattern, an OEM tire size of 225/50R17, and a 66.5mm center bore.
Other years of the Audi A4
2021 Audi A4 Engine & Trim Levels
Detailed tire and wheel breakdown for the 2021 Audi A4
Tire geometry â 225/50R17
The 225/50R17 fitted to the 2021 Audi A4 has a section width of 225mm and an aspect ratio of 50%, mounted on a 17-inch rim. That gives a sidewall height of 112.5mm (4.43") and an overall outside diameter of 656.8mm (25.86"). At highway speed this tire completes roughly 485 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2021 Audi A4 while keeping the speedometer accurate, target a 235/42R18 (plus-one). For a softer ride or winter setup, a 215/58R16 (minus-one) keeps the overall diameter within Âą3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2021 Audi A4 uses a 5x112 bolt pattern with a 66.5mm hub bore. Safe rim width range for the OEM tire is 7.0J â 8.0J, and offsets in the ET33 â ET43 window will clear suspension and fender without rubbing on most setups.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2021 Audi A4 is printed on the driver-side door jamb sticker â always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
OEM Wheel & Tire Specs
| Engine & Trim | Tire Size | Rim Size | Offset (ET) | |
|---|---|---|---|---|
| 35 TDI / 40 TDI (2.0) | 17x7.5J | ET38 | ||
| 35 TFSI (1.5 / 2.0) | 17x7.5J | ET38 | ||
| 40 TFSI (2.0) | 18x8.0J | ET40 | ||
| 45 TFSI Quattro | 18x8.0J | ET40 | ||
| 50 TDI / 55 TDI V6 | 18x8.0J | ET40 |
Frequently Asked Questions
What tire size does the 2021 Audi A4 35 TDI / 40 TDI (2.0) use?
The 2021 Audi A4 35 TDI / 40 TDI (2.0) uses 225/50R17 tires as standard equipment.
What tire size does the 2021 Audi A4 35 TFSI (1.5 / 2.0) use?
The 2021 Audi A4 35 TFSI (1.5 / 2.0) uses 225/50R17 tires as standard equipment.
What tire size does the 2021 Audi A4 40 TFSI (2.0) use?
The 2021 Audi A4 40 TFSI (2.0) uses 245/40R18 tires as standard equipment.
What tire size does the 2021 Audi A4 45 TFSI Quattro use?
The 2021 Audi A4 45 TFSI Quattro uses 245/40R18 tires as standard equipment.
What tire size does the 2021 Audi A4 50 TDI / 55 TDI V6 use?
The 2021 Audi A4 50 TDI / 55 TDI V6 uses 245/40R18 tires as standard equipment.
What is the bolt pattern of the 2021 Audi A4?
The 2021 Audi A4 has a 5x112 bolt pattern with a center bore of 66.5mm.
What is the wheel offset of the 2021 Audi A4?
The 2021 Audi A4 has a wheel offset of ET38.
Other Vehicles with 5x112 Bolt Pattern
The following vehicles share the same 5x112 bolt pattern as the 2021 Audi A4, making wheel interchangeability possible (verify offset and center bore before swapping).