Audi A3 Sportback g-tron (2017) Wheel Fitment
Audi A3 Sportback g-tron (2017): 5x112 bolt pattern, 57.1mm center bore. Factory wheels: 17x7.5J F/R. Reference fitment ranges.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 17x7.5J F/R |
| Flush Fitment | 18x8.5J at ET38 offset |
| Maximum Aggressive | 19x9.0J at ET35 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
Most of the engineering value in a forged wheel over a cast one shows up in rotational mass, not outright strength — both can meet the same load rating, but the forged piece gets there lighter. On a sedan platform tuned for everyday balance, that weight saving is felt directly in steering response and ride quality.
The Audi A3 Sportback g-tron runs a 5x112 bolt pattern, 57.1mm center bore, and a 17x7.5J, front and rear, wheel from the factory. Our Flush Fitment reference is 18x8.5J ET38, which tucks the tire under the fender lip on a stock-height Audi A3 Sportback g-tron. Our Maximum Aggressive reference is 19x9.0J ET35 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Audi A3 Sportback g-tron OE Wheel Specs
The 2017 Audi A3 Sportback g-tron (Compact) uses a 5x112 bolt pattern with a 57.1mm center bore. Factory wheels are 17x7.5J F/R.
Why the factory spec works for most owners:
- Balances ride comfort with everyday drivability
- A commonly used size for this vehicle class, supporting parts and tire availability
- Maintains clearance for the factory suspension and brake components
- Provides stable, predictable handling across normal driving conditions
Flush Fitment
For a flush look with minimal rubbing, F/R 18x8.5J ET38 is the recommended starting point on a stock or mildly lowered Audi A3 Sportback g-tron.
Maximum Aggressive Fitment
F/R 19x9.0J ET35 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 17x7.5J ET46
Recommended setup: 17x7.5J ET46 | 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 18x8.0J ET42
Recommended setup: 18x8.0J ET42 | 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 18x8.5J ET38
Recommended setup: 18x8.5J ET38 | 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 19x9.0J ET37
Recommended setup: 19x9.0J ET37 | 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 19x9.0J ET35
Recommended setup: 19x9.0J ET35 | 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 | 17x7.5J ET46 | 18x8.0J ET42 | 18x8.5J ET38 | 19x9.0J ET37 | 19x9.0J ET35 |
| 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: 17x7.5J ET46
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: 18x8.5J ET38
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: 19x9.0J ET35
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: 17x7.5J ET46 → ~6.06″ backspacing
- Flush: 18x8.5J ET38 → ~6.25″ backspacing
- Max: 19x9.0J ET35 → ~6.38″ 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 A3 Sportback g-tron? 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 A3 Sportback g-tron use?
How many lug bolts does the Audi A3 Sportback g-tron use?
What is the center bore size on the Audi A3 Sportback g-tron?
What size are the factory (stock) wheels on the Audi A3 Sportback g-tron?
What is the biggest wheel size I can fit on my Audi A3 Sportback g-tron without rubbing?
What does a flush wheel fitment look like on the Audi A3 Sportback g-tron?
Do I need wheel spacers for my Audi A3 Sportback g-tron?
How do I calculate wheel backspacing for my Audi A3 Sportback g-tron?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my Audi A3 Sportback g-tron?
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.