1978 Pontiac Sunbird tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 4x101.6 on every 1978 trim.

Tires for the 1978 Pontiac Sunbird

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

175/80R13 Best-rated standard on 4 trims

Check price on Amazon · 175/80R13
195/65R14 Best-rated optional on 4 trims

Check price on Amazon · 195/65R14
205/55R15 Best-rated optional on 1 trim

Check price on Amazon · 205/55R15

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Trims sold in 1978: 4
Generation: H-body
Other years: 1975
1976
1977
1978
1979
1980
1982
1983
All years (1975–1994)

4 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.

Pontiac Sunbird H-body

1975–1980 4 trims

Sunbird 2.3 +2 variants 78 hp · I4 175/80SR13 3 fitments

Same tires and wheels on: 2.5, 3.8

Generation: H-body · 1975–1980
Power: 78 hp
Engine: I4, Petrol
Center bore: 69.1 mm
Bolt pattern: 4x101.6
Thread: 7/16" - 20 UNF

Check price on Amazon · 175/80R13 Wheels 13x5 ET37 · 4x101.6 · 69.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
175/80SR13	Rim 13x5 ET37 ~~4x101.6~~	30 psi
175/80SR13	Rim 13x6 ET37 ~~4x101.6~~	30 psi
195/65HR14	Rim 14x6 ET35 ~~4x101.6~~	30 psi

Sunbird 5.0 139 hp · V8 175/80SR13 3 fitments

Generation: H-body · 1975–1980
Power: 139 hp
Engine: V8, Petrol
Center bore: 69.1 mm
Bolt pattern: 4x101.6
Thread: 7/16" - 20 UNF

Check price on Amazon · 175/80R13 Wheels 13x6 ET37 · 4x101.6 · 69.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
175/80SR13	Rim 13x6 ET37 ~~4x101.6~~	30 psi
195/65HR14	Rim 14x6 ET35 ~~4x101.6~~	30 psi
205/55VR15	Rim 15x6.5 ET35 ~~4x101.6~~	33 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: 4
Generation: H-body
Other years: 1975
1976
1977
1978
1979
1980
1982
1983
All years (1975–1994)

Considering a different size?

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

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