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2023 Alfa Romeo Giulia Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Alfa Romeo Giulia wheels? This page gives the 2023 Alfa Romeo Giulia bolt pattern (5x110), centre bore, factory rim size and the offset range for aftermarket and forged Alfa Romeo Giulia rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2023 Alfa Romeo Giulia uses a 5x110 bolt pattern with a 65.1 mm centre bore and M12x1.5 lug nuts. Factory wheels: 18x8.0J, front and rear. For aftermarket wheels, 19x8.5J ET30 sits flush and 20x9.0J ET25 is the most aggressive fit.
Forged wheels for the 2023 Alfa Romeo Giulia — drilled 5x110 with a 65.1 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Alfa Romeo Giulia (2023): 5x110 bolt pattern, 65.1mm center bore. Factory wheels: 18x8.0J F/R. Reference fitment ranges.
Bolt Pattern5x110
Wheel Bolt/NutM12x1.5 Nut
Center Bore65.1mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year2023
CategorySedan
✓ 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) | 18x8.0J F/R |
| Flush Fitment | 19x8.5J at ET30 offset |
| Maximum Aggressive | 20x9.0J at ET25 offset |
Forged Wheel Designs for the Alfa Romeo Giulia
Every design below is forged to order, so it can be machined to the Alfa Romeo Giulia's 5x110 bolt pattern and 65.1 mm center bore, with the width and offset calculated for your setup.
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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
A sedan's wheel spec is a balance point the factory tuned between ride comfort, steering feel, and everyday durability. Forging lets us hold that same structural margin while cutting rotational mass, which is where most of the real-world benefit — quicker steering response, marginally better ride — actually comes from.
The Alfa Romeo Giulia runs a 5x110 bolt pattern, 65.1mm center bore, and a 18x8.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 19x8.5J ET30, which tucks the tire under the fender lip on a stock-height Alfa Romeo Giulia. Our Maximum Aggressive reference is 20x9.0J ET25 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Alfa Romeo Giulia OE Wheel Specs
The 2023 Alfa Romeo Giulia (Sedan) uses a 5x110 bolt pattern with a 65.1mm center bore. Factory wheels are 18x8.0J F/R.
Why the factory spec works for most owners:
- Balances ride comfort with everyday fuel efficiency
- A widely used size in this segment, so tire and wheel availability stays strong
- Keeps unsprung weight low for stable, predictable handling
- Maintains clearance for the factory brake calipers and suspension components
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Alfa Romeo Giulia (2023) we drill the 5x110 pattern and cut the centre bore to 65.1mm 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: 18x8.0J ET34 → ~5.84″ backspacing
- Flush: 19x8.5J ET30 → ~5.93″ 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 Alfa Romeo spec, or want a wheel built to a custom offset for your Alfa Romeo Giulia? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Alfa Romeo Giulia: Specs by Model Year
Vehicles With the Same Hub as the Alfa Romeo Giulia (5x110, 65.1 mm Bore)
In our database, 137 other vehicle entries from 19 makes use exactly the same 5x110 bolt pattern and 65.1 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.
5x110 is used by 2.2% of the vehicle pages in our English fitment guide (145 of 6,503); 96.6% of those also use a 65.1 mm center bore.
Hub-Centric Rings for a 65.1 mm Center Bore
A wheel with a center bore larger than 65.1 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 66.1 mm | 66.1 → 65.1 mm |
| 66.6 mm | 66.6 → 65.1 mm |
| 67.1 mm | 67.1 → 65.1 mm |
| 70.1 mm | 70.1 → 65.1 mm |
| 73.1 mm | 73.1 → 65.1 mm |
ANKUSI forged wheels are bored to exactly 65.1 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Alfa Romeo Giulia use?
The 2023 Alfa Romeo Giulia uses a 5x110 bolt pattern.
How many lug bolts does the Alfa Romeo Giulia use?
The Alfa Romeo Giulia uses a 5-lug bolt pattern (5x110), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Alfa Romeo Giulia?
The Alfa Romeo Giulia's center bore is 65.1mm. 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 Alfa Romeo Giulia?
Factory wheels on the Alfa Romeo Giulia are 18x8.0J F/R.
What is the biggest wheel size I can fit on my Alfa Romeo Giulia 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 Alfa Romeo Giulia?
For a flush look with minimal to no rubbing, we recommend 19x8.5J at ET30 offset as a starting point on a stock or mildly lowered Alfa Romeo Giulia.
Do I need wheel spacers for my Alfa Romeo Giulia?
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 Alfa Romeo Giulia?
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 5.93" 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 Alfa Romeo Giulia?
The Alfa Romeo Giulia 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.
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: 18x8 wheels · 18 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.