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1971 Cadillac Eldorado Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Cadillac Eldorado wheels? This page gives the 1971 Cadillac Eldorado bolt pattern (5x127), 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 1971 Cadillac Eldorado uses a 5x127 bolt pattern with a 78.1 mm centre bore and M12x1.5 lug nuts. Factory wheels: 15x6.0J, front and rear. For aftermarket wheels, 17x8.0J ET0 sits flush and 18x9.0J ET-10 is the most aggressive fit.
Forged wheels for the 1971 Cadillac Eldorado — drilled 5x127 with a 78.1 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Cadillac Eldorado (1971): 5x127 bolt pattern, 78.1mm center bore. Factory wheels: 15x6.0J F/R. Reference fitment ranges.
Bolt Pattern5x127
Wheel Bolt/NutM12x1.5 Nut
Center Bore78.1mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year1971
CategoryCoupe
✓ 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) | 15x6.0J F/R |
| Flush Fitment | 17x8.0J at ET0 offset |
| Maximum Aggressive | 18x9.0J at ET-10 offset |
Forged Wheel Designs for the Cadillac Eldorado
Every design below is forged to order, so it can be machined to the Cadillac Eldorado's 5x127 bolt pattern and 78.1 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
The Cadillac Eldorado's chassis tuning assumes a certain amount of rotational mass at each corner. Forging lets ANKUSI cut that mass while matching the factory strength rating, which sharpens turn-in and reduces the energy the brakes have to absorb — a real gain on a coupe platform, not just a styling change.
The Cadillac Eldorado runs a 5x127 bolt pattern, 78.1mm center bore, and a 15x6.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 17x8.0J ET0, which tucks the tire under the fender lip on a stock-height Cadillac Eldorado. Our Maximum Aggressive reference is 18x9.0J ET-10 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Cadillac Eldorado OE Wheel Specs
The 1971 Cadillac Eldorado (Coupe) uses a 5x127 bolt pattern with a 78.1mm 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 (1971) we drill the 5x127 pattern and cut the centre bore to 78.1mm 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: 15x6.0J ET15 → ~4.09″ backspacing
- Flush: 17x8.0J ET0 → ~4.5″ backspacing
- Max: 18x9.0J ET-10 → ~4.61″ 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.
Cadillac Eldorado: Specs by Model Year
| 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.
Vehicles With the Same Hub as the Cadillac Eldorado (5x127, 78.1 mm Bore)
In our database, 5 other vehicle entries from 3 makes use exactly the same 5x127 bolt pattern and 78.1 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.
5x127 is used by 1.3% of the vehicle pages in our English fitment guide (82 of 6,503); 8.5% of those also use a 78.1 mm center bore.
Hub-Centric Rings for a 78.1 mm Center Bore
A wheel with a center bore larger than 78.1 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 84.1 mm | 84.1 → 78.1 mm |
| 93.1 mm | 93.1 → 78.1 mm |
| 100.1 mm | 100.1 → 78.1 mm |
| 106.1 mm | 106.1 → 78.1 mm |
ANKUSI forged wheels are bored to exactly 78.1 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Cadillac Eldorado use?
The 1971 Cadillac Eldorado uses a 5x127 bolt pattern.
How many lug bolts does the Cadillac Eldorado use?
The Cadillac Eldorado uses a 5-lug bolt pattern (5x127), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Cadillac Eldorado?
The Cadillac Eldorado's center bore is 78.1mm. 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 Cadillac Eldorado?
Factory wheels on the Cadillac Eldorado are 15x6.0J F/R.
What is the biggest wheel size I can fit on my Cadillac Eldorado without rubbing?
The most aggressive fitment we recommend without fender work is 18x9.0J at ET-10 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 Cadillac Eldorado?
For a flush look with minimal to no rubbing, we recommend 17x8.0J at ET0 offset as a starting point on a stock or mildly lowered Cadillac Eldorado.
Do I need wheel spacers for my Cadillac Eldorado?
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 Cadillac Eldorado?
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 4.5" 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 Cadillac Eldorado?
The Cadillac Eldorado 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: 15x6 wheels · 15 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.