2021 Audi A6 Tire Size Factory tire sizes, bolt pattern & tire pressure
Tire Sizes
225/55R18, 245/45R19
Bolt Pattern
5x112
Offset
30-42
Tire Pressure
35/38 PSI
Tire Sizes by Trim
| Trim | Tire Size | Bolt Pattern | Pressure (F/R) |
|---|---|---|---|
| Premium 45 TFSI | 225/55R18 | 5x112 | 35/38 PSI |
| Premium Plus 55 TFSI quattro | 245/45R19 | 5x112 | 35/38 PSI |
Alternative Tire Sizes
These sizes are within 3% diameter of the factory 225/55R18 and may fit the 2021 Audi A6.
245/45R19 Safe
0.2% · +20mm · +1" rim 245/50R18 Safe
0.3% · +20mm · same rim 215/70R16 Safe
0.4% · -10mm · -2" rim 225/60R17 Safe
0.4% · same width · -1" rim 245/55R17 Safe
0.5% · +20mm · -1" rim 225/65R16 Safe
0.8% · same width · -2" rim 215/65R17 Safe
0.9% · -10mm · -1" rim 235/65R16 Safe
1.0% · +10mm · -2" rim
Related Comparisons
225/55R18 vs 235/55R19 Crossover size upgrade 215/60R17 vs 225/55R18 Crossover rim upgrade 225/55R18 vs 235/55R18 Midsize SUV width upgrade 225/55R18 vs 245/50R19 SUV plus-one wider upgrade 245/45R19 vs 255/40R20 Performance plus-one upgrade 225/50R18 vs 245/45R19 Plus-one wider sedan 215/55R18 vs 225/55R18 EV crossover width upgrade
Tire Maintenance Tips for the Audi A6
Proper tire maintenance extends tire life and keeps your 2021 Audi A6 safe on the road. Follow these guidelines from NHTSA:
- Check tire pressure monthly — the Audi A6 requires 35/38 PSI (front/rear). Check when tires are cold, before driving.
- Rotate tires every 5,000–7,500 miles — this ensures even wear across all four tires, especially important for vehicles with staggered setups.
- Inspect tread depth regularly — the legal minimum is 2/32", but most experts recommend replacing tires at 4/32" for adequate wet traction.
- Check the DOT date code — tires older than 6 years should be inspected by a professional, regardless of tread depth. The 4-digit DOT code on the sidewall shows the week and year of manufacture.
Choosing Alternative Tires
When replacing tires on your 2021 Audi A6, stay within 3% of the factory tire's overall diameter to avoid affecting your speedometer accuracy, ABS calibration, and traction control. The factory bolt pattern (5x112) and offset (30-42) must also match.
Always verify any alternative size with a qualified tire professional before purchase. For more information on tire safety, see the NHTSA Tire Ratings Search.