GEO Spectrum wheel and tire size by year

Select your car year to get the specific wheel size, tire size, lug bolt pattern (PCD) and other wheel specs for the GEO Spectrum.

1985–1990

years covered

generation

4x100

bolt pattern

model years

GEO Spectrum JT150

1985 – 1990 USA market

Common sizes

The sizes fitted to the most GEO Spectrum trims. For exact fitment, pick a production year above.

185/60R1412 trims 185/55R1512 trims 195/50R1512 trims 195/45R1612 trims 175/70R136 trims 175/65R146 trims 195/55R146 trims 175/55R156 trims

Bolt pattern

Bolt pattern (PCD)	Model years
4x100	1985–1990

The GEO Spectrum bolt pattern is 4x100 for model years 1985–1990.

Same make

Reading a tire sidewall is easy. Find out what the size, load index, speed rating and date code mean.

Tire tread depth is an important factor in keeping your vehicle safe — how to measure it and when to replace.

We tested seven supercapacitor jump starters to find the ones worth buying.