tirewheelguide

1991 Ford Bronco tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x139.7 on every 1991 trim.

Tires for the 1991 Ford Bronco

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

  1. 235/75R15 Best-rated standard on 3 trims
    Check price on Amazon · 235/75R15
  2. 215/75R15 Best-rated optional on 3 trims
    Check price on Amazon · 215/75R15
  3. 31x10.50R15 optional on 3 trims
    Check price on Amazon · 31x10.50R15

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Trims sold in 1991
3
Generation
IV

3 trims sold in 1991

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

Ford Bronco IV

1987–1991 3 trims
Bronco 4.9 +2 variants 145 hp · 4.9L I6 235/75SR15 4 fitments

Same tires and wheels on: 5.0, 5.8

Generation
IV · 1987–1991
Power
145 hp
Engine
4.9L I6, Petrol
Center bore
87.1 mm
Bolt pattern
5x139.7
Thread
1/2" - 20 UNF
Check price on Amazon · 235/75R15 Wheels 15x6 ET0 · 5x139.7 · 87.1 mm on Amazon
Tire sizeRim size and bolt patternPressure, psi
235/75SR15Rim 15x6 ET0 5x139.7–
215/75SR15Rim 15x6 ET0 5x139.7–
31x10.50 R15Rim 15x7 ET10 5x139.7–
235/75SR15Rim 15x7 ET10 5x139.7–
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 1991
3
Generation
IV
Other years
All years (1966–2026)

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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