1980 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 1980 Pontiac Grand Am.

1980 Pontiac Grand Am tire sizes

225/70R15

Bolt pattern

Other years

Fitment tables

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

1978 – 1980 USA market 2 trims

170 hp · V8 225/70 R15 1 fitment

GenerationG-body 1978–1980

Power170 hp

EngineV8, Petrol

Center bore70.3 mm

PCD5x120.65

Thread7/16" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
225/70 R15	15x7 ET8 ~~5x120.65~~	–	Tires Rims

160 hp · V8 225/70 R15 1 fitment

GenerationG-body 1978–1980

Power160 hp

EngineV8, Petrol

Center bore70.3 mm

PCD5x120.65

Thread7/16" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
225/70 R15	15x7 ET8 ~~5x120.65~~	–	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.