tirewheelguide

1978 Mercury Cougar tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x114.3 on every 1978 trim.

Tires for the 1978 Mercury Cougar

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

  1. 205xR14 standard on 3 trims
    Check price on Amazon · 205xR14
  2. 220/78R14 Best-rated optional on 3 trims
    Check price on Amazon · 220/78R14
  3. 205/75R15 Best-rated optional on 3 trims
    Check price on Amazon · 205/75R15

Also listed: 225/70R15 205/70R16 225/65R16

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Trims sold in 1978
3
Generation
IV

3 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.

Mercury Cougar IV

1977–1979 3 trims
Cougar 4.9 +2 variants 134 hp · V8 205x SR14 6 fitments

Same tires and wheels on: 5.8, 6.6

Generation
IV · 1977–1979
Power
134 hp
Engine
V8, Petrol
Center bore
70.5 mm
Bolt pattern
5x114.3
Thread
1/2" - 20 UNF
Check price on Amazon · 205xR14 Wheels 14x6 ET10 · 5x114.3 · 70.5 mm on Amazon
Tire sizeRim size and bolt patternPressure, psi
205x SR14Rim 14x6 ET10 5x114.3–
220/78SR14Rim 14x6.5 ET10 5x114.326 psi
205/75SR15Rim 15x6 ET10 5x114.326 psi
225/70SR15Rim 15x6.5 ET10 5x114.326 psi
205/70SR16Rim 16x6 ET10 5x114.329 psi
225/65SR16Rim 16x7 ET0 5x114.329 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
3
Generation
IV
Other years
All years (1967–2002)

Considering a different size?

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

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