1970 Oldsmobile 88 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 1970 Oldsmobile 88.

1970 Oldsmobile 88 tire sizes

225/70RS15

Bolt pattern

5x127

Other years

1966 1967 1968 1969 1970 1971 1972 1973 All 1949–1999

Fitment tables

4 trims sold in 1970

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

Oldsmobile 88 VI B-body Facelift

1967 – 1967 USA market 4 trims

88 5.4

215 hp · V8 225/70 SR15 1 fitment

GenerationVI B-body Facelift 1967–1967

Power215 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

88 5.7

249 hp · V8 225/70 SR15 1 fitment

GenerationVI B-body Facelift 1967–1967

Power249 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

88 7.0

282 hp · V8 225/70 SR15 1 fitment

GenerationVI B-body Facelift 1967–1967

Power282 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

88 7.5

310 hp · V8 225/70 SR15 1 fitment

GenerationVI B-body Facelift 1967–1967

Power310 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

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.