1981 Cadillac Seville tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x120.65 on every 1981 trim.

Tires for the 1981 Cadillac Seville

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

205/75R15 Best-rated standard on 3 trims

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

Check price on Amazon · 215/75R15
225/65R16 Best-rated optional on 3 trims

Check price on Amazon · 225/65R16

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Trims sold in 1981: 3
Generation: K-body II
Other years: 1977
1978
1979
1980
1981
1982
1983
1984
All years (1975–2004)

3 trims sold in 1981

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 Seville K-body II

1980–1985 3 trims

Seville 4.1 +2 variants 135 hp · HT-4100 V8 205/75R15 99S 3 fitments

Same tires and wheels on: 5.7D, 6.0

Generation: K-body II · 1980–1985
Power: 135 hp
Engine: HT-4100 V8, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x120.65
Thread: M12 x 1.5

Check price on Amazon · 205/75R15 Wheels 15x6 ET13 · 5x120.65 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
205/75R15 99S	Rim 15x6 ET13 ~~5x120.65~~	32 psi
215/75R15 99S	Rim 15x6.5 ET10 ~~5x120.65~~	32 psi
225/65R16 99S	Rim 16x7 ET10 ~~5x120.65~~	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). ET13 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.