Audi Wheel Size Guide: Standard & Optional Factory Fitments by Model – Find the Perfect Rollers for Your Ride
You’re scrolling through photos of stunning Audis, admiring how the perfect set of wheels transforms the entire character of the car—then you look at your own and wonder if you’ve got the right fitment. Choosing the right wheel size isn’t just about looks—it’s about preserving that signature Audi handling, ride comfort, and Quattro confidence.
TLDR: Audi offers a wide range of factory wheel sizes across its lineup, from 16-inch basics on the A3 to massive 22-inch options on the Q7 and e-tron. This guide covers standard and optional fitments for every current and recent Audi model, including bolt patterns, offsets, and tire specifications to help you choose the perfect setup.
Your Audi’s wheels are the connection between its engineering excellence and the road. The right wheel size enhances handling, braking, and acceleration while maintaining the ride quality that makes Audis so enjoyable. The wrong size can ruin the experience—harsh rides, poor handling, and even mechanical issues. Understanding Audi’s factory fitments is the first step to getting it right.
Here’s something many owners don’t realize: Audi spends millions developing each wheel and tire combination for optimal performance. The factory sizes are engineered to work with your Quattro system, suspension geometry, and electronic stability control. Deviating too far from these specifications can compromise safety and performance.
Key Takeaways
- Know your bolt pattern: Most modern Audis use 5x112mm; older models use 5x100mm or 4x100mm
- Center bore matters: Audi uses 57.1mm center bore on most models—this must match for proper fitment
- Offset is critical: The wrong offset changes handling, can cause rubbing, and strains wheel bearings
- Tire size counts: Matching tire diameter is essential for speedometer accuracy and Quattro compatibility
- OEM+ upgrades: Many Audi models can accept larger wheels from higher models with proper fitment
Understanding Audi Wheel Fitment Basics
Ever wonder what those numbers like 18×8.5 ET35 actually mean?
Before diving into specific models, let’s decode wheel specifications:
Wheel Diameter: The overall wheel size (e.g., 18 inches). Larger diameter allows for bigger brakes and improves handling, but can affect ride quality.
Wheel Width: The distance between the inner and outer flanges (e.g., 8.5 inches). Wider wheels allow wider tires for more grip but can cause rubbing.
Offset (ET): The distance between the wheel’s mounting surface and its centerline—measured in millimeters. Positive offset means the mounting surface is closer to the outside of the wheel. The right offset ensures the wheel sits properly in the fender without rubbing.
Bolt Pattern: The number of bolts and the diameter of the circle they form. Most modern Audis use 5x112mm.
Center Bore: The hole in the center of the wheel that fits over the hub. Most Audis use 57.1mm.
Pro tip: The center bore is non-negotiable. If the center bore is larger than 57.1mm, you can use hub-centric rings. If it’s smaller, the wheel won’t fit.
Audi Models and Factory Wheel Fitments
Audi A3 (8V/8Y – 2013–Present)
| Trim Level | Standard Fitment | Optional Fitment | Bolt Pattern | Center Bore | Offset Range |
|---|---|---|---|---|---|
| A3 Base | 16×6.5 ET45 | 17×7 ET45 | 5×112 | 57.1 | ET45–ET50 |
| A3 Sport | 17×7 ET45 | 18×7.5 ET51 | 5×112 | 57.1 | ET45–ET51 |
| S3 | 18×8 ET45 | 19×8 ET50 | 5×112 | 57.1 | ET45–ET50 |
| RS3 | 19×8.5 ET49 | 19×8.5 ET49 | 5×112 | 57.1 | ET49 |
Tire Sizes:
- 16″: 205/55R16
- 17″: 225/45R17
- 18″: 225/40R18 (S3: 235/35R19)
- 19″: 235/35R19 (RS3: 255/30R19)
Notes: The RS3 has wider front tires than rear on some models—always check your specific year.
Audi A4 (B8/B9 – 2008–Present)
| Trim Level | Standard Fitment | Optional Fitment | Bolt Pattern | Center Bore | Offset Range |
|---|---|---|---|---|---|
| A4 Base | 17×7.5 ET47 | 18×8 ET47 | 5×112 | 57.1 | ET43–ET47 |
| A4 Premium | 18×8 ET47 | 19×8.5 ET43 | 5×112 | 57.1 | ET43–ET47 |
| S4 | 18×8 ET47 | 19×8.5 ET40 | 5×112 | 57.1 | ET40–ET47 |
| RS4 | 19×9 ET26 | 20×9 ET29 | 5×112 | 57.1 | ET26–ET29 |
Tire Sizes:
- 17″: 225/50R17
- 18″: 245/40R18
- 19″: 245/35R19 (S4: 255/35R19)
- 20″: 255/30R20 (RS4)
Notes: The RS4 uses a significantly lower offset for a wider, more aggressive stance.
Audi A5 (8T/8W – 2007–Present)
| Trim Level | Standard Fitment | Optional Fitment | Bolt Pattern | Center Bore | Offset Range |
|---|---|---|---|---|---|
| A5 Base | 17×7.5 ET47 | 18×8 ET47 | 5×112 | 57.1 | ET45–ET47 |
| A5 Premium | 18×8 ET47 | 19×8.5 ET43 | 5×112 | 57.1 | ET43–ET47 |
| S5 | 18×8 ET47 | 19×9 ET33 | 5×112 | 57.1 | ET33–ET47 |
| RS5 | 19×9 ET26 | 20×9 ET22 | 5×112 | 57.1 | ET22–ET26 |
Tire Sizes:
- 17″: 225/50R17
- 18″: 245/40R18
- 19″: 255/35R19 (S5: 265/35R19)
- 20″: 275/30R20 (RS5)
Notes: The S5 and RS5 can accommodate much wider tires, contributing to their aggressive stance and handling.
Audi A6 (C7/C8 – 2011–Present)
| Trim Level | Standard Fitment | Optional Fitment | Bolt Pattern | Center Bore | Offset Range |
|---|---|---|---|---|---|
| A6 Base | 18×8 ET45 | 19×8.5 ET47 | 5×112 | 57.1 | ET45–ET47 |
| A6 Premium | 19×8.5 ET47 | 20×8.5 ET45 | 5×112 | 57.1 | ET45–ET47 |
| S6 | 19×8.5 ET47 | 20×9 ET45 | 5×112 | 57.1 | ET45–ET47 |
| RS6 | 21×10.5 ET28 | 22×10.5 ET28 | 5×112 | 57.1 | ET28 |
Tire Sizes:
- 18″: 245/45R18
- 19″: 255/40R19
- 20″: 255/40R20 (or 265/35R20)
- 21″: 275/35R21 (RS6)
- 22″: 285/30R22 (RS6)
Notes: The RS6 features massive brakes that require at least 21-inch wheels. Wheel weights and offsets are critical for this high-performance model.
Audi Q5 (2010–Present)
| Trim Level | Standard Fitment | Optional Fitment | Bolt Pattern | Center Bore | Offset Range |
|---|---|---|---|---|---|
| Q5 Base | 17×7.5 ET45 | 18×8 ET45 | 5×112 | 57.1 | ET45–ET48 |
| Q5 Premium | 18×8 ET45 | 19×8.5 ET43 | 5×112 | 57.1 | ET43–ET45 |
| SQ5 | 19×8.5 ET43 | 20×9 ET40 | 5×112 | 57.1 | ET40–ET43 |
| RS Q5 | 21×9 ET30 | — | 5×112 | 57.1 | ET30 |
Tire Sizes:
- 17″: 235/65R17
- 18″: 235/60R18
- 19″: 255/50R19
- 20″: 255/45R20 (SQ5: 255/40R21)
- 21″: 255/40R21
Notes: The Q5’s suspension is tuned for comfort, so larger wheels (20+ inches) can significantly reduce ride quality. Choose wisely based on your priorities.
Audi Q7 (2015–Present)
| Trim Level | Standard Fitment | Optional Fitment | Bolt Pattern | Center Bore | Offset Range |
|---|---|---|---|---|---|
| Q7 Base | 18×8 ET45 | 19×8.5 ET47 | 5×112 | 57.1 | ET45–ET47 |
| Q7 Premium | 19×8.5 ET47 | 20×9 ET45 | 5×112 | 57.1 | ET45–ET47 |
| SQ7 | 20×9 ET45 | 21×9.5 ET40 | 5×112 | 57.1 | ET40–ET45 |
| RS Q7 | 21×9.5 ET40 | 22×10 ET35 | 5×112 | 57.1 | ET35–ET40 |
Tire Sizes:
- 18″: 255/60R18
- 19″: 255/55R19
- 20″: 285/45R20
- 21″: 285/40R21
- 22″: 295/35R22
Notes: The Q7 is heavy (over 5,000 lbs), so load ratings on both wheels and tires are critical. Never compromise on load capacity.
Audi Q8 (2018–Present)
| Trim Level | Standard Fitment | Optional Fitment | Bolt Pattern | Center Bore | Offset Range |
|---|---|---|---|---|---|
| Q8 Base | 20×9 ET45 | 21×9.5 ET40 | 5×112 | 57.1 | ET40–ET45 |
| Q8 Premium | 21×9.5 ET40 | 22×10 ET35 | 5×112 | 57.1 | ET35–ET40 |
| RS Q8 | 22×10 ET35 | 23×10.5 ET30 | 5×112 | 57.1 | ET30–ET35 |
Tire Sizes:
- 20″: 285/45R20
- 21″: 285/40R21
- 22″: 295/35R22 (RS Q8: 295/35R23)
- 23″: 295/30R23
Notes: The RS Q8 uses massive wheels to clear its carbon-ceramic brake options. These wheels are expensive and not easily swapped.
The Wheel Size Chart
Standard and optional wheel sizes across Audi’s current lineup
Tire Size and Speedometer Accuracy
Tire size must match the original diameter within 3% to maintain speedometer accuracy and Quattro compatibility.
Checking Tire Diameter:
- OEM tire size: 225/40R18 = 25.1 inches diameter
- Alternative: 235/35R19 = 25.5 inches (within 1.6% – acceptable)
- Alternative: 225/40R19 = 26.1 inches (4% – too large, speedometer error)
Formula: Tire Diameter = (Width × Aspect Ratio × 2 ÷ 25.4) + Wheel Diameter
Example (225/40R18):
- Width = 225mm
- Aspect ratio = 40% = 90mm sidewall height
- Sidewall × 2 = 180mm = 7.09 inches
- + Wheel Diameter (18 inches) = 25.09 inches overall diameter
Any tire size with an overall diameter within 3% of 25.1 inches (24.3–25.9 inches) is acceptable.
Fitment Considerations
Winter Wheels
Many Audi owners use smaller wheels for winter:
- Better ride quality on rough winter roads
- Narrower tires cut through snow better
- Less expensive to replace if damaged
- More tire choices in winter-specific compounds
Always check brake clearance—some models require at least 17-inch wheels for brake caliper clearance.
Quattro Compatibility
Your Quattro system requires all four tires to have nearly identical rolling diameters. Even a 2% difference can cause:
- Transmission binding
- Increased wear on center differential
- Reduced traction and stability
Never mix tire sizes or brands on a Quattro vehicle unless the diameters are within 1% of each other.
Brake Clearance
Performance models with larger brakes require larger wheels:
- A3/S3: Minimum 17″ (some 16″ fit)
- S4/S5: Minimum 18″ (check your specific brakes)
- RS models: Minimum 19″ (some require 20″)
- Q7 with big brakes: Minimum 20″
When buying aftermarket wheels, confirm brake clearance with the manufacturer.
Bolt Pattern Conversions
Most modern Audis use 5x112mm. However, some older models (pre-2005) use:
- 5x100mm: A4 B5, A3 8L, TT 8N, older Golfs
- 4x100mm: Very early A3 models
Adapters are available but add unsprung weight and change offset—use them only with caution.
Common Fitment Mistakes
Mistake #1: Wrong Offset
Using wheels with the wrong offset changes the scrub radius, affecting:
- Steering feel (heavier or lighter)
- Suspension geometry (accelerates wear)
- Wheel bearing life (increased loads)
- Fender clearance (rubbing)
Mistake #2: Incorrect Center Bore
Even if the bolt pattern matches, the center bore must be correct:
- Too small: The wheel won’t mount
- Too large: The wheel can wobble, requiring hub-centric rings
Mistake #3: Oversized Wheels
Installing oversized wheels often causes:
- Harsh ride quality
- Increased unsprung weight (hurts acceleration and braking)
- Reduced fuel economy
- Potential rubbing during suspension travel or steering
- More expensive tires (and fewer choices)
Mistake #4: Incompatible Tires
Using the wrong tire size affects:
- Speedometer accuracy
- ABS and ESC functionality
- Quattro system health
- Overall safety
Reference Sources
Trusted Resources for Audi Wheel Fitment Information:
- Audi USA – Official Model Specifications & Wheel Options
- WillTheyFit.com – Tire & Wheel Comparison Tool
- Audizine Forums – Wheel & Tire Discussions
- ECS Tuning – Audi Wheel & Tire Packages
What wheels are you running on your Audi—factory stock or an aftermarket upgrade? Share your fitment details in the comments—your experience could help another owner choose the perfect setup for their ride. And if you’ve got photos of your wheel setup, we’d love to see them!