Audi RS4 (2008) Wheel Fitment
Audi RS4 (2008): 5x112 bolt pattern, 57.1mm center bore. Factory wheels: 19x9.0J F/R. Reference fitment ranges.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 19x9.0J F/R |
| Flush Fitment | 20x9.5J at ET25 offset |
| Maximum Aggressive | 20x10.0J at ET20 offset |
How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
A wagon carries wagon-specific weight distribution — more mass over the rear axle when loaded — so wheel strength at the rear corners matters as much as the front. Forging lets us match the factory's strength target on both ends while keeping rotational mass down, which keeps the ride composed whether the cargo area is empty or full.
The Audi RS4 runs a 5x112 bolt pattern, 57.1mm center bore, and a 19x9.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 20x9.5J ET25, which tucks the tire under the fender lip on a stock-height Audi RS4. Our Maximum Aggressive reference is 20x10.0J ET20 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Audi RS4 OE Wheel Specs
The 2008 Audi RS4 (Sedan/Avant) uses a 5x112 bolt pattern with a 57.1mm center bore. Factory wheels are 19x9.0J F/R.
Why the factory spec works for most owners:
- Supports passenger and cargo load capacity
- Balances ride comfort with everyday practicality
- A widely used size for this vehicle class, supporting parts and tire availability
- Maintains clearance for the factory suspension and brake package
Flush Fitment
For a flush look with minimal rubbing, F/R 20x9.5J ET25 is the recommended starting point on a stock or mildly lowered Audi RS4.
Maximum Aggressive Fitment
F/R 20x10.0J ET20 is a more aggressive reference setup. Beyond this, expect rubbing under compression without fender rolling or camber correction.
5-Tier Configuration Options
A Factory-Style 19x9.0J ET29
Recommended setup: 19x9.0J ET29 | Economy impact: Negligible | Best for: Daily commuting, family use
Appearance: 7/10 | Comfort: 9.5/10 | Install difficulty: ★☆☆☆☆
Estimated cost: $450-800 (wheels + tires + install)
B Comfortable Upgrade 20x9.5J ET27
Recommended setup: 20x9.5J ET27 | Economy impact: -2 to -4% | Best for: Daily / street
Appearance: 8/10 | Comfort: 9/10 | Install difficulty: ★☆☆☆☆
Estimated cost: $1,950-2,550 (wheels + tires + install)
C Balanced / Flush Fit 20x9.5J ET25
Recommended setup: 20x9.5J ET25 | Economy impact: -4 to -6% | Best for: Street
Appearance: 8.5/10 | Comfort: 8/10 | Install difficulty: ★★☆☆☆
Estimated cost: $2,600-3,400 (wheels + tires + install)
D Aggressive 20x10.0J ET23
Recommended setup: 20x10.0J ET23 | Economy impact: -6 to -9% | Best for: Show / occasional track
Appearance: 9/10 | Comfort: 6.5/10 | Install difficulty: ★★★☆☆
Estimated cost: $3,900-5,000 (wheels + tires + install)
E Max Aggressive 20x10.0J ET20
Recommended setup: 20x10.0J ET20 | Economy impact: -8 to -12% | Best for: Show only
Appearance: 9.5/10 | Comfort: 4/10 | Install difficulty: ★★★★☆
Estimated cost: $4,800-6,200+ (wheels + tires + install)
Performance Comparison Matrix
| Metric | Tier A | Tier B | Tier C | Tier D | Tier E |
|---|---|---|---|---|---|
| Wheel Spec | 19x9.0J ET29 | 20x9.5J ET27 | 20x9.5J ET25 | 20x10.0J ET23 | 20x10.0J ET20 |
| Economy Impact | Negligible | -2 to -4% | -4 to -6% | -6 to -9% | -8 to -12% |
| Appearance | 7/10 | 8/10 | 8.5/10 | 9/10 | 9.5/10 |
| Comfort | 9.5/10 | 9/10 | 8/10 | 6.5/10 | 4/10 |
| Install Difficulty | ★☆☆☆☆ | ★☆☆☆☆ | ★★☆☆☆ | ★★★☆☆ | ★★★★☆ |
| Cost Range | $450-800 | $1,950-2,550 | $2,600-3,400 | $3,900-5,000 | $4,800-6,200+ |
| Best For | Daily commuting, family use | Daily / street | Street | Show / occasional track | Show only |
Real-World Reference Cases
The examples below are compiled from typical ANKUSI customer configurations and are labeled as reference cases, not individually verified real-world builds.
Case 1: Daily Driver (Factory-Style)
Profile: Everyday driving, prioritizes comfort and low running cost.
Setup: 19x9.0J ET29
Cost: ~$620
Outcome: Minimal visual change, ride and fuel economy essentially unaffected.
Case 2: Balanced Enthusiast (Balanced / Flush Fit)
Profile: Wants a sportier stance without sacrificing daily usability.
Setup: 20x9.5J ET25
Cost: ~$3,000
Outcome: Noticeable visual upgrade, fuel economy drop within the expected range.
Case 3: Show Build (Max Aggressive)
Profile: Built primarily for shows or occasional track/show use.
Setup: 20x10.0J ET20
Cost: ~$5,500
Outcome: Maximum visual impact; daily comfort and fuel economy are heavily compromised, physical test fit required before production.
Decision Guide
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: 19x9.0J ET29 → ~6.14″ backspacing
- Flush: 20x9.5J ET25 → ~6.23″ backspacing
- Max: 20x10.0J ET20 → ~6.29″ backspacing
Want to check a different width or offset before you order? Use our Offset & Backspacing Calculator to solve the numbers yourself, or looking for your exact Audi spec, or want a wheel built to a custom offset for your Audi RS4? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Frequently Asked Questions
What bolt pattern (PCD) does the Audi RS4 use?
How many lug bolts does the Audi RS4 use?
What is the center bore size on the Audi RS4?
What size are the factory (stock) wheels on the Audi RS4?
What is the biggest wheel size I can fit on my Audi RS4 without rubbing?
What does a flush wheel fitment look like on the Audi RS4?
Do I need wheel spacers for my Audi RS4?
How do I calculate wheel backspacing for my Audi RS4?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my Audi RS4?
Wheel Installation Reference: Torque, Thread & TPMS
Thread & Fastener: M14x1.5, ball-seat lug bolt (13mm radius).
Factory Torque Spec: 120 Nm (89 ft-lb). Shared VW/Audi Group ball-seat bolt spec used across most 5x112 Audi models.
TPMS: TPMS (Tire Pressure Monitoring System) has been federally mandated on all new light vehicles sold in the US since the 2008 model year. If your wheels use OE-style sensors, have them transferred or cloned to the new wheels at installation.
Tire Pressure: Always set tire pressure to the value on your vehicle's tire placard (driver's doorjamb or glovebox), not the max PSI printed on the tire sidewall — this is trim- and tire-size-specific and stays the same reference point when you switch to a different wheel and tire combination.
Reference data compiled from published OEM service specifications and cross-checked against independent repair sources; always confirm against your owner's manual or door-jamb placard before installation.