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

Check the tables below for every tire size, wheel size, bolt pattern (PCD), rim offset and tire pressure fitted to the 1985 Pontiac Grand Am.

1985 Pontiac Grand Am tire sizes

Bolt pattern

Other years

Fitment tables

Open a trim for its factory package and every alternative size, front and rear.

1985 – 1991 USA market 2 trims

90 hp · I4 185/80 SR13 3 fitments

GenerationN-body 1985–1991

Power90 hp

EngineI4, Petrol

Center bore57.1 mm

PCD5x100

ThreadM12 x 1.5

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

125 hp · V6 205/70 SR13 3 fitments

GenerationN-body 1985–1991

Power125 hp

EngineV6, Petrol

Center bore57.1 mm

PCD5x100

ThreadM12 x 1.5

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
205/70 SR13	13x5.5 ET42 ~~5x100~~	29	Tires Rims
215/60 HR14	14x6 ET42 ~~5x100~~	32	Tires Rims
205/60 HR15	15x6 ET42 ~~5x100~~	33	Tires Rims

Reading the table

OE fitment: The package fitted at the factory for that trim.
Alternative: A size the car accepts without modification — plus-sizing, winter setups or optional wheels.
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.
Staggered: A wider tire on the rear axle than the front. Front-to-back rotation is not possible.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.