tirewheelguide

1978 Jeep CJ tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x139.7 on every 1978 trim.

Tires for the 1978 Jeep CJ

Sizes most trims come with first. Open your trim below for its exact size.

  1. 205xR15 standard on 5 trims
    Check price on Amazon · 205xR15
  2. 6.85xR15 standard on 1 trim
    Check price on Amazon · 6.85xR15
  3. 225/75R15 Best-rated optional on 5 trims
    Check price on Amazon · 225/75R15

Also listed: 235/75R15 7.00xR15 7.35xR15 6.00xR16

TireWheelGuide may earn a commission from purchases made through these links.

Trims sold in 1978
6
Generations
CJ-7/CJ-8CJ-5/CJ-6

6 trims sold in 1978

Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

Jeep CJ CJ-7/CJ-8

1976–1986 5 trims
CJ 2.4D +4 variants 60 hp · 2.4L I4 · Diesel 205x SR15 3 fitments

Same tires and wheels on: 2.5, 3.8, 4.2, 5.0

Generation
CJ-7/CJ-8 · 1976–1986
Power
60 hp
Engine
2.4L I4, Diesel
Center bore
108 mm
Bolt pattern
5x139.7
Thread
1/2" - 20 UNF
Check price on Amazon · 205xR15 Wheels 15x6 ET12 · 5x139.7 · 108 mm on Amazon
Tire sizeRim size and bolt patternPressure, psi
205x SR15Rim 15x6 ET12 5x139.7–
225/75SR15Rim 15x7 ET-12 5x139.7–
235/75SR15Rim 15x8 ET-12 5x139.7–

Jeep CJ CJ-5/CJ-6

1955–1983 1 trim
CJ 3.8 99 hp · 3.8L I6 6.85x D15 4 fitments
Generation
CJ-5/CJ-6 · 1955–1983
Power
99 hp
Engine
3.8L I6, Petrol
Center bore
108 mm
Bolt pattern
5x139.7
Thread
1/2" - 20 UNF
Check price on Amazon · 6.85xR15 Wheels 15x5.5 ET12 · 5x139.7 · 108 mm on Amazon
Tire sizeRim size and bolt patternPressure, psi
6.85x D15Rim 15x5.5 ET12 5x139.725 psi
7.00x D15Rim 15x5.5 ET12 5x139.728 psi
7.35x D15Rim 15x5.5 ET12 5x139.725 psi
6.00x D16Rim 16x4.5 ET22 5x139.726 psi
What these columns mean
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.
Thread size
Lug bolt or nut thread — needed when buying aftermarket fasteners.
Trims sold in 1978
6
Generations
CJ-7/CJ-8CJ-5/CJ-6
Other years
All years (1945–1986)

Considering a different size?

Compare your current tire size with the one you want: diameter change, ground clearance and speedometer error.

Open the size calculator

Guides worth reading first

All articles
Basics

How to read a tire sidewall

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

Continue reading
Guide

Everything you need to know about tire tread depth

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

Continue reading
Gear

Best supercapacitor jump starter review

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

Continue reading