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1990 GEO Spectrum 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 1990 GEO Spectrum.

1990 GEO Spectrum tire sizes

185/60R14185/55R15195/50R15195/45R16175/70R13175/65R14195/55R14175/55R15
Bolt pattern
Other years
198519861987198819891990 All 1985–1990
Fitment tables

3 trims sold in 1990

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

GEO Spectrum JT150

1985 – 1990 USA market 3 trims

Spectrum 1.5i

70 hp · I4 175/70 R13 82T 4 fitments
GenerationJT150 1985–1990
Power70 hp
EngineI4, Petrol
Center bore56.1 mm
PCD4x100
ThreadM12 x 1.5
Tire sizeRim size and bolt patternPressure, psiPrices
175/70 R13 82T13x5 ET39 4x10029TiresRims
175/65 R14 82T14x5 ET41 4x10029TiresRims
175/55 R15 80H15x6 ET45 4x10030TiresRims
185/55 R15 81H15x6 ET43 4x10030TiresRims

Spectrum 1.5i Turbo

110 hp · I4 185/60 R14 82H 4 fitments
GenerationJT150 1985–1990
Power110 hp
EngineI4, Petrol
Center bore56.1 mm
PCD4x100
ThreadM12 x 1.5
Tire sizeRim size and bolt patternPressure, psiPrices
185/60 R14 82H14x5.5 ET42 4x10030TiresRims
185/55 R15 81V15x6 ET43 4x10030TiresRims
195/50 R15 82H15x6 ET45 4x10030TiresRims
195/45 R16 82H16x6.5 ET42 4x10033TiresRims

Spectrum 1.6i

95 hp · I4 185/60 R14 82H 4 fitments
GenerationJT150 1985–1990
Power95 hp
EngineI4, Petrol
Center bore56.1 mm
PCD4x100
ThreadM12 x 1.5
Tire sizeRim size and bolt patternPressure, psiPrices
185/60 R14 82H14x5.5 ET42 4x10030TiresRims
195/55 R14 82H14x6 ET45 4x10030TiresRims
195/50 R15 82H15x6 ET45 4x10030TiresRims
195/45 R16 82H16x6.5 ET42 4x10030TiresRims
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.

Considering a different size?

Run your OE size against the one you want to see diameter change, ground clearance and speedometer error.

Open the size calculator
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