1985 Pontiac Grand Am tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x100 on every 1985 trim.

Tires for the 1985 Pontiac Grand Am

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

205/70R13 Best-rated standard on 1 trim · optional on 1

Check price on Amazon · 205/70R13
185/80R13 Best-rated standard on 1 trim

Check price on Amazon · 185/80R13
215/60R14 Best-rated optional on 2 trims

Check price on Amazon · 215/60R14

Also listed: 205/60R15

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Trims sold in 1985: 2
Generation: N-body
Other years: 1975
1978
1979
1980
1985
1986
1987
1988
All years (1972–2005)

2 trims sold in 1985

Open a trim for its tire and rim sizes, bolt pattern and tire pressure.

Pontiac Grand Am N-body

1985–1991 2 trims

Grand Am 2.5i 90 hp · I4 185/80SR13 3 fitments

Generation: N-body · 1985–1991
Power: 90 hp
Engine: I4, Petrol
Center bore: 57.1 mm
Bolt pattern: 5x100
Thread: M12 x 1.5

Check price on Amazon · 185/80R13 Wheels 13x5.5 ET38 · 5x100 · 57.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
185/80SR13	Rim 13x5.5 ET38 ~~5x100~~	29 psi
205/70SR13	Rim 13x5.5 ET42 ~~5x100~~	29 psi
215/60HR14	Rim 14x6 ET42 ~~5x100~~	32 psi

Grand Am 3.0i 125 hp · V6 205/70SR13 3 fitments

Generation: N-body · 1985–1991
Power: 125 hp
Engine: V6, Petrol
Center bore: 57.1 mm
Bolt pattern: 5x100
Thread: M12 x 1.5

Check price on Amazon · 205/70R13 Wheels 13x5.5 ET42 · 5x100 · 57.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
205/70SR13	Rim 13x5.5 ET42 ~~5x100~~	29 psi
215/60HR14	Rim 14x6 ET42 ~~5x100~~	32 psi
205/60HR15	Rim 15x6 ET42 ~~5x100~~	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 1985: 2
Generation: N-body
Other years: 1975
1978
1979
1980
1985
1986
1987
1988
All years (1972–2005)

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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