1981 Oldsmobile 98 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 1981 Oldsmobile 98.

1981 Oldsmobile 98 tire sizes

225/70RS15

Bolt pattern

5x127

Other years

1977 1978 1979 1980 1981 1982 1983 1984 All 1965–1996

Fitment tables

4 trims sold in 1981

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

Oldsmobile 98 X C-platform

1977 – 1984 USA market 4 trims

98 4.1

125 hp · LC4 V6 225/70 SR15 1 fitment

GenerationX C-platform 1977–1984

Power125 hp

EngineLC4 V6, Petrol

Center bore78.3 mm

PCD5x127

Thread1/2" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
225/70 SR15	15x6.5 ET0 ~~5x127~~	–	Tires Rims

98 5.0

134 hp · V8 225/70 SR15 1 fitment

GenerationX C-platform 1977–1984

Power134 hp

EngineV8, Petrol

Center bore78.3 mm

PCD5x127

Thread1/2" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
225/70 SR15	15x6.5 ET0 ~~5x127~~	–	Tires Rims

98 5.7

160 hp · V8 225/70 SR15 1 fitment

GenerationX C-platform 1977–1984

Power160 hp

EngineV8, Petrol

Center bore78.3 mm

PCD5x127

Thread1/2" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
225/70 SR15	15x6.5 ET0 ~~5x127~~	–	Tires Rims

98 5.7 D

103 hp · LF9 V8 225/70 SR15 1 fitment

GenerationX C-platform 1977–1984

Power103 hp

EngineLF9 V8, Diesel

Center bore78.3 mm

PCD5x127

Thread1/2" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
225/70 SR15	15x6.5 ET0 ~~5x127~~	–	Tires Rims

Reading the table

What these columns mean

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.