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2003 ABT Audi AS4 Cabriolet Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting ABT Audi AS4 Cabriolet wheels? This page gives the 2003 ABT Audi AS4 Cabriolet bolt pattern (5x112), centre bore, factory rim size and the offset range for aftermarket and forged ABT Audi AS4 Cabriolet rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2003 ABT Audi AS4 Cabriolet uses a 5x112 bolt pattern with a 57.1 mm centre bore and M14x1.5 lug bolts. Factory wheels: 19x8.5J, front and rear. For aftermarket wheels, 19x9.0J ET30 sits flush and 20x9.0J ET25 is the most aggressive fit.
Forged wheels for the 2003 ABT Audi AS4 Cabriolet — drilled 5x112 with a 57.1 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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ABT Audi AS4 Cabriolet (2003): 5x112 bolt pattern, 57.1mm center bore. Factory wheels: 19x8.5J F/R. Reference fitment ranges.
Bolt Pattern5x112
Wheel Bolt/NutM14x1.5 Bolt
Center Bore57.1mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year2003
CategoryConvertible
✓ Data check: the bolt pattern and center bore on this page match an independent fitment reference. Last reviewed September 18, 2026. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 19x8.5J F/R |
| Flush Fitment | 19x9.0J at ET30 offset |
| Maximum Aggressive | 20x9.0J at ET25 offset |
Forged Wheel Designs for the ABT Audi AS4 Cabriolet
Every design below is forged to order, so it can be machined to the ABT Audi AS4 Cabriolet's 5x112 bolt pattern and 57.1 mm center bore, with the width and offset calculated for your setup.
Hyper Silver Mesh Riveted Polished Lip 2-Piece Forged Wheels
2-Piece · Hyper Silver
Maybach-Style Mirror Polished 3-Slot Dish Forged Wheels
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WF Polished Transparent Frozen Gold 10-Spoke Forged Wheels
Replica · Polished Transparent Frozen Gold
Rays-Style Gunmetal Mesh Multi-Spoke Forged Wheels
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Matte Silver Full-Face Forged Wheels
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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
With less structural stiffness from the missing roof, a convertible's suspension tuning leans more heavily on unsprung mass control. Forged construction keeps wheel weight down at the same strength rating, which is one less variable working against the ABT Audi AS4 Cabriolet's chassis.
The ABT Audi AS4 Cabriolet runs a 5x112 bolt pattern, 57.1mm center bore, and a 19x8.5J, front and rear, wheel from the factory. Our Flush Fitment reference is 19x9.0J ET30, which tucks the tire under the fender lip on a stock-height ABT Audi AS4 Cabriolet. Our Maximum Aggressive reference is 20x9.0J ET25 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
ABT Audi AS4 Cabriolet OE Wheel Specs
The 2003 ABT Audi AS4 Cabriolet (Convertible) uses a 5x112 bolt pattern with a 57.1mm center bore. Factory wheels are 19x8.5J 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
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the ABT Audi AS4 Cabriolet (2003) we drill the 5x112 pattern and cut the centre bore to 57.1mm on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: 19x8.5J ET35 → ~6.13″ backspacing
- Flush: 19x9.0J ET30 → ~6.18″ backspacing
- Max: 20x9.0J ET25 → ~5.98″ 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 abt spec, or want a wheel built to a custom offset for your ABT Audi AS4 Cabriolet? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Vehicles With the Same Hub as the ABT Audi AS4 Cabriolet (5x112, 57.1 mm Bore)
In our database, 407 other vehicle entries from 18 makes use exactly the same 5x112 bolt pattern and 57.1 mm center bore. Factory wheels from these cars bolt on and center on the hub without rings; offset and width still have to be checked.
5x112 is used by 21.6% of the vehicle pages in our English fitment guide (1,407 of 6,503); 29.0% of those also use a 57.1 mm center bore.
Hub-Centric Rings for a 57.1 mm Center Bore
A wheel with a center bore larger than 57.1 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 60.1 mm | 60.1 → 57.1 mm |
| 63.4 mm | 63.4 → 57.1 mm |
| 64.1 mm | 64.1 → 57.1 mm |
| 65.1 mm | 65.1 → 57.1 mm |
| 73.1 mm | 73.1 → 57.1 mm |
ANKUSI forged wheels are bored to exactly 57.1 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the ABT Audi AS4 Cabriolet use?
The 2003 ABT Audi AS4 Cabriolet uses a 5x112 bolt pattern.
How many lug bolts does the ABT Audi AS4 Cabriolet use?
The ABT Audi AS4 Cabriolet uses a 5-lug bolt pattern (5x112), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the ABT Audi AS4 Cabriolet?
The ABT Audi AS4 Cabriolet's center bore is 57.1mm. If an aftermarket wheel has a larger center bore than this, hub-centric rings are recommended so the wheel centers on the hub itself rather than relying on the lug bolts alone.
What size are the factory (stock) wheels on the ABT Audi AS4 Cabriolet?
Factory wheels on the ABT Audi AS4 Cabriolet are 19x8.5J F/R.
What is the biggest wheel size I can fit on my ABT Audi AS4 Cabriolet without rubbing?
The most aggressive fitment we recommend without fender work is 20x9.0J at ET25 offset. Going beyond this typically causes rubbing under compression unless you roll the fenders or add camber correction.
What does a flush wheel fitment look like on the ABT Audi AS4 Cabriolet?
For a flush look with minimal to no rubbing, we recommend 19x9.0J at ET30 offset as a starting point on a stock or mildly lowered ABT Audi AS4 Cabriolet.
Do I need wheel spacers for my ABT Audi AS4 Cabriolet?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
How do I calculate wheel backspacing for my ABT Audi AS4 Cabriolet?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 6.18" of backspacing.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my ABT Audi AS4 Cabriolet?
The ABT Audi AS4 Cabriolet runs the same wheel size front and rear from the factory, so staggered fitment is not required. ANKUSI can still forge a staggered set (wider rear) on request if you want a more aggressive stance.
Sources and Last Update
Data checked against: avtoreference.com, tirewheelguide.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 19x8.5 wheels · 19 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.