Alfa Romeo Giulia Quadrifoglio 100th (2023) Bolt Pattern & Wheel Fitment
Alfa Romeo Giulia Quadrifoglio 100th (2023): 5x110 bolt pattern, 65.1mm center bore. Factory wheels: F: 19x8.5J R: 19x10.0J. Reference fitment ranges.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | F: 19x8.5J R: 19x10.0J |
| Flush Fitment | F 20x9.0J ET30 / R 20x10.5J ET35 |
| Maximum Aggressive | F 20x9.5J ET25 / R 20x11.0J ET30 |
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
The Alfa Romeo Giulia Quadrifoglio 100th's factory wheel spec reflects a deliberate balance between comfort, steering feel and durability that the engineering team tuned for. Forging lets ANKUSI match that same strength target while trimming rotational mass — the part of a wheel upgrade that actually changes how the car drives, not just how it looks.
The Alfa Romeo Giulia Quadrifoglio 100th runs a 5x110 bolt pattern, 65.1mm center bore, and a F: 19x8.5J wheel from the factory. Our Flush Fitment reference is F 20x9.0J ET30 / R 20x10.5J ET35, which tucks the tire under the fender lip on a stock-height Alfa Romeo Giulia Quadrifoglio 100th. Our Maximum Aggressive reference is F 20x9.5J ET25 / R 20x11.0J ET30 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Alfa Romeo Giulia Quadrifoglio 100th OE Wheel Specs
The 2023 Alfa Romeo Giulia Quadrifoglio 100th (Sedan) uses a 5x110 bolt pattern with a 65.1mm center bore. Factory wheels are F: 19x8.5J R: 19x10.0J.
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 Alfa Romeo Giulia Quadrifoglio 100th (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 — 6,436 vehicles, free to download, CC BY 4.0.
Flush Fitment
For a flush look with minimal rubbing, F 20x9.0J ET30 / R 20x10.5J ET35 is the recommended starting point on a stock or mildly lowered Alfa Romeo Giulia Quadrifoglio 100th.
Maximum Aggressive Fitment
F 20x9.5J ET25 / R 20x11.0J ET30 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 F 19x8.5J ET34 / R 19x10.0J ET38
Recommended setup: F 19x8.5J ET34 / R 19x10.0J ET38 | 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 F 20x9.0J ET32 / R 20x10.5J ET37
Recommended setup: F 20x9.0J ET32 / R 20x10.5J ET37 | 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 F 20x9.0J ET30 / R 20x10.5J ET35
Recommended setup: F 20x9.0J ET30 / R 20x10.5J ET35 | 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 F 20x9.5J ET28 / R 20x11.0J ET33
Recommended setup: F 20x9.5J ET28 / R 20x11.0J ET33 | 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 F 20x9.5J ET25 / R 20x11.0J ET30
Recommended setup: F 20x9.5J ET25 / R 20x11.0J ET30 | 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 | F 19x8.5J ET34 / R 19x10.0J ET38 | F 20x9.0J ET32 / R 20x10.5J ET37 | F 20x9.0J ET30 / R 20x10.5J ET35 | F 20x9.5J ET28 / R 20x11.0J ET33 | F 20x9.5J ET25 / R 20x11.0J ET30 |
| 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: F 19x8.5J ET34 / R 19x10.0J ET38
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: F 20x9.0J ET30 / R 20x10.5J ET35
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: F 20x9.5J ET25 / R 20x11.0J ET30
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: F 19x8.5J ET34 → ~6.09″ F backspacing, R 19x10.0J ET38 → ~7″ R backspacing
- Flush: F 20x9.0J ET30 → ~6.18″ F backspacing, R 20x10.5J ET35 → ~7.13″ R backspacing
- Max: F 20x9.5J ET25 → ~6.23″ F backspacing, R 20x11.0J ET30 → ~7.18″ R 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 Quadrifoglio 100th? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Custom Forged Wheels for the Alfa Romeo Giulia Quadrifoglio 100th (2023)
Everything above is reference data. If you want wheels actually built to it, that is what ANKUSI does: we are a forged wheel factory in Guangzhou, China, IATF 16949 and ISO 9001 certified, forging on our own 10,000-ton press and producing over 120,000 wheels a year. Forging blank, CNC machining, finishing, coating and inspection all happen in the same building — nothing is subcontracted and nothing is relabelled from another manufacturer.
Every set is cut to order, so the 5x110 pattern and the 65.1mm centre bore are machined for this car specifically rather than shimmed with adaptor rings. Diameter, width, offset, concavity, monoblock or multi-piece construction and the finish are all yours to choose.
Designs we already tool for the 5x110 pattern — each one is re-cut to your sizes and offsets:
Alfa Romeo Style Matte Silver 5-Spoke Forged Wheels – Alfa Romeo Giulia / Alfa Romeo Stelvio Fitment (5-Lug)
Alfa Romeo Style Metallic Gray 5-Spoke Forged Wheels – Alfa Romeo Giulia / Citroen C5 Fitment (5-Lug)
Alfa Romeo Style Gloss Black 5-Spoke Forged Wheels – Alfa Romeo Giulia / Alfa Romeo Stelvio Fitment (5-Lug)
MZANZI EDITION Matte Silver Fine Multi-Spoke Forged Wheels – Alfa Romeo Giulia Quadrifoglio Luna Rossa Fitment (19-22in, 5×110)