Fitting Cadillac Eldorado wheels? This page gives the 1979 Cadillac Eldorado bolt pattern (5x120.65), centre bore, factory rim size and the offset range for aftermarket and forged Cadillac Eldorado rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1979 Cadillac Eldorado uses a 5x120.65 bolt pattern with a 70.3 mm centre bore and M12x1.5 lug nuts. Factory wheels: 15x6J at ET35. For aftermarket wheels, 16x7J ET25 sits flush and 17x8J ET20 is the most aggressive fit.
Forged wheels for the 1979 Cadillac Eldorado — drilled 5x120.65 with a 70.3 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in about 25 days.
Cadillac Eldorado (1979): 5x120.65 bolt pattern, 70.3mm center bore. Factory wheels: 15x6J. Reference fitment ranges.
✓ Data check: the bolt pattern and center bore on this page match an independent fitment reference. Last reviewed September 18, 2026. How we verify
Built to order by ANKUSI — IATF 16949 & ISO 9001 certified forged wheel manufacturer, TÜV/SFI/VIA compliant. See our factory & certifications →
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 15x6J at ET35 |
| Flush Fitment | 16x7J at ET25 offset |
| Maximum Aggressive | 17x8J at ET20 offset |
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.
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 15x6J at ET35, front and rear, wheel from the factory. Our Flush Fitment reference is 16x7J ET25, which tucks the tire under the fender lip on a stock-height Cadillac Eldorado. Our Maximum Aggressive reference is 17x8J ET20 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
The 1979 Cadillac Eldorado (Coupe) uses a 5x120.65 bolt pattern with a 70.3mm center bore. Factory wheels are 15x6J at ET35.
Why the factory spec works for most owners:
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Cadillac Eldorado (1979) 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 — 10,093 vehicles, free to download, CC BY 4.0.
For a flush look with minimal rubbing, 16x7J ET25 is the recommended starting point on a stock or mildly lowered Cadillac Eldorado.
17x8J ET20 is a more aggressive reference setup. Beyond this, expect rubbing under compression without fender rolling or camber correction.
Downsized FWD E-body uses 5x120.65 (4.75") PCD
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: $1,200-1,500 (wheels + tires + install)
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)
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)
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)
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)
| 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 | $1,200-1,500 | $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 |
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.
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
Final clearance depends on the exact tire model, suspension height, brake package, alignment and vehicle tolerances. A physical test fit is recommended before production.
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.
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 16x7J ET25 flush setup and the 17x8J ET20 aggressive setup referenced above.
We do not hold 5x120.65 wheels on a shelf — they are forged to order, which is why any offset, width and bore combination on this page is buildable rather than limited to a stock list.
In our database, 62 other vehicle entries from 6 makes use exactly the same 5x120.65 bolt pattern and 70.3 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.
5x120.65 is used by 1.6% of the vehicle pages in our English fitment guide (101 of 6,503); 63.4% of those also use a 70.3 mm center bore.
| Year | Bolt pattern | Center bore | Factory wheel |
|---|---|---|---|
| 1953 | 5x127 | 108 mm | 15x6J |
| 1954 | 5x127 | 108 mm | 15x6J |
| 1956 | 5x127 | 108 mm | 15x6J |
| 1957 | 5x127 | 108 mm | 15x6J |
| 1959 | 5x127 | 108 mm | 15x6J |
| 1960 | 5x127 | 108 mm | 15x6J |
| 1962 | 5x127 | 108 mm | 15x6J |
| 1964 | 5x127 | 108 mm | 15x6J |
| 1967 | 5x127 | 78.1 mm | 15x6J |
| 1971 | 5x127 | 78.1 mm | 15x6J |
| 1979 | 5x120.65 | 70.3 mm | 15x6J |
| 1984 | 5x120.65 | 70.3 mm | 15x6J |
| 2001 | 5x115 | 70.3 mm | 16x7J |
Check the model year before ordering: the specs change — center bore 108 mm → 78.1 mm from 1967; bolt pattern 5x127 → 5x120.65 from 1979; center bore 78.1 mm → 70.3 mm from 1979; bolt pattern 5x120.65 → 5x115 from 2001.
A wheel with a center bore larger than 70.3 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 70.5 mm | 70.5 → 70.3 mm |
| 71.6 mm | 71.6 → 70.3 mm |
| 72.6 mm | 72.6 → 70.3 mm |
| 73.1 mm | 73.1 → 70.3 mm |
ANKUSI forged wheels are bored to exactly 70.3 mm for this vehicle, so no ring is needed.
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: 15x6 wheels · 15 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
Every design below is forged to order, so it can be machined to the Cadillac Eldorado's 5x120.65 bolt pattern and 70.3 mm center bore, with the width and offset calculated for your setup.
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Bolt pattern and center bore on this page were cross-checked against at least two independent sources before publication. Last reviewed 2026-09-18. Spotted an error? Email info@ankusi.com and we will verify and correct it.