tirewheelguide

1978 Cadillac DeVille tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x127 on every 1978 trim.

Tires for the 1978 Cadillac DeVille

Sizes most trims come with first. Open your trim below for its exact size.

  1. 215/75R15 Best-rated standard on 2 trims
    Check price on Amazon · 215/75R15
  2. 235/70R15 Best-rated optional on 2 trims
    Check price on Amazon · 235/70R15
  3. 235/65R16 Best-rated optional on 2 trims
    Check price on Amazon · 235/65R16

Also listed: 255/55R17

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Trims sold in 1978
2
Generation
C-body III

2 trims sold in 1978

Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

Cadillac DeVille C-body III

1977–1984 2 trims
DeVille 7.0 +1 variant 180 hp · L33 V8 215/75SR15 4 fitments

2 versions of this trim share these tires and wheels.

Generation
C-body III · 1977–1984
Power
180 hp
Engine
L33 V8, Petrol
Center bore
78.1 mm
Bolt pattern
5x127
Thread
1/2" - 20 UNF
Check price on Amazon · 215/75R15 Wheels 15x6 ET13 · 5x127 · 78.1 mm on Amazon
Tire sizeRim size and bolt patternPressure, psi
215/75SR15Rim 15x6 ET13 5x12732 psi
235/70SR15Rim 15x7 ET10 5x12732 psi
235/65HR16Rim 16x7.5 ET5 5x12735 psi
255/55HR17Rim 17x8 ET0 5x12736 psi
What these columns mean
Rim size
Rim diameter × width in inches, and the factory offset (ET) in millimetres, e.g. 18x7.5 ET25.
Bolt pattern (PCD)
Number of studs and the diameter of the circle they sit on. It must match exactly.
Center bore
Diameter of the hub hole. Larger aftermarket bores need hub-centric rings.
Pressure
Recommended cold inflation pressure for that axle, in psi.
Thread size
Lug bolt or nut thread — needed when buying aftermarket fasteners.
Trims sold in 1978
2
Generation
C-body III
Other years
All years (1971–2005)

Considering a different size?

Compare your current tire size with the one you want: diameter change, ground clearance and speedometer error.

Open the size calculator

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