1979 Cadillac Fleetwood Brougham tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x127 on every 1979 trim.

Tires for the 1979 Cadillac Fleetwood Brougham

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

205xR15 standard on 3 trims

Check price on Amazon · 205xR15
215/75R15 Best-rated optional on 3 trims

Check price on Amazon · 215/75R15
225/75R15 Best-rated optional on 3 trims

Check price on Amazon · 225/75R15

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Trims sold in 1979: 3
Generation: D-body
Other years: 1977
1978
1979
1980
1981
1982
1983
1984
All years (1977–1986)

3 trims sold in 1979

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 Fleetwood Brougham D-body

1977–1986 3 trims

Fleetwood Brougham 5.7D +2 variants 105 hp · LF9 V8 · Diesel 205x R15 99S 4 fitments

Same tires and wheels on: 7.0

Generation: D-body · 1977–1986
Power: 105 hp
Engine: LF9 V8, Diesel
Center bore: 78.1 mm
Bolt pattern: 5x127
Thread: 7/16" - 20 UNF

Check price on Amazon · 205xR15 Wheels 15x6 ET15 · 5x127 · 78.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
205x R15 99S	Rim 15x6 ET15 5x127	32 psi
215/75R15 99S	Rim 15x6 ET15 5x127	32 psi
225/75R15 99S	Rim 15x6.5 ET10 5x127	32 psi
235/65R16 97H	Rim 16x7 ET0 5x127	32 psi

How to read 99S: 99 is the load index (up to 1,709 lb / 775 kg per tire) and S the speed rating (up to 112 mph / 180 km/h). ET15 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres. Compare offsets in the wheel offset calculator.

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.