Cadillac Eldorado (1984) Bolt Pattern & Wheel Fitment
Cadillac Eldorado (1984): 5x120.65 bolt pattern, 70.3mm center bore. Factory wheels: 15x6.0J F/R. Reference fitment ranges.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 15x6.0J F/R |
| Flush Fitment | 16x7.0J at ET25 offset |
| Maximum Aggressive | 17x8.0J 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
On a performance-oriented coupe, the wheel is one of the few components where shaving weight has a compounding effect — less rotational mass means less work for the brakes, the drivetrain, and the chassis on every input. A forged wheel gets there without compromising the strength margin the factory engineered in.
The Cadillac Eldorado runs a 5x120.65 bolt pattern, 70.3mm center bore, and a 15x6.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 16x7.0J ET25, which tucks the tire under the fender lip on a stock-height Cadillac Eldorado. Our Maximum Aggressive reference is 17x8.0J ET20 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Cadillac Eldorado OE Wheel Specs
The 1984 Cadillac Eldorado (Coupe) uses a 5x120.65 bolt pattern with a 70.3mm center bore. Factory wheels are 15x6.0J 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 Cadillac Eldorado (1984) we drill the 5x120.65 pattern and cut the centre bore to 70.3mm 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/R 16x7.0J ET25 is the recommended starting point on a stock or mildly lowered Cadillac Eldorado.
Maximum Aggressive Fitment
F/R 17x8.0J 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 15x6.0J ET35
Recommended setup: 15x6.0J ET35 | 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 16x6.5J ET30
Recommended setup: 16x6.5J ET30 | 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 16x7.0J ET25
Recommended setup: 16x7.0J 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 17x7.5J ET23
Recommended setup: 17x7.5J 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 17x8.0J ET20
Recommended setup: 17x8.0J 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 | 15x6.0J ET35 | 16x6.5J ET30 | 16x7.0J ET25 | 17x7.5J ET23 | 17x8.0J 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: 15x6.0J ET35
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: 16x7.0J 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: 17x8.0J 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: 15x6.0J ET35 → ~4.88″ backspacing
- Flush: 16x7.0J ET25 → ~4.98″ backspacing
- Max: 17x8.0J ET20 → ~5.29″ 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 Cadillac spec, or want a wheel built to a custom offset for your Cadillac Eldorado? 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 Cadillac Eldorado (1984)
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 5x120.65 pattern and the 70.3mm 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 — most Cadillac orders on this platform land somewhere between the 16x7.0J ET25 flush setup and the 17x8.0J ET20 aggressive setup referenced above.
Designs we already tool for the 5x120.65 pattern — each one is re-cut to your sizes and offsets:
Chevrolet Corvette Style Brushed Silver 10 Y-Spoke Machined Face Forged Wheels – Chevrolet Corvette / Cadillac CT5 Fitment (5-Lug)
Chevrolet Corvette Style Bright Silver 5 Y-Spoke Left/Right Directional Double-Ring Forged Wheels – Chevrolet Corvette / Cadillac CT5 Fitment (5-Lug)
Chevrolet Corvette Style Custom Finish Racing Beadlock Forged Wheels – Chevrolet Corvette / Ford Mustang Fitment (5-Lug)
Chevrolet Corvette Style Custom Finish Racing Beadlock Forged Wheels – Chevrolet Corvette / Ford Mustang Fitment (5-Lug)