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1975 GMC Suburban 2500 tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 8x165.1 on every 1975 trim.

Tires for the 1975 GMC Suburban 2500

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

  1. 7.50xR16.5 standard on 3 trims
    Check price on Amazon · 7.50xR16.5
  2. 10.0x0R16.5 optional on 3 trims
    Check price on Amazon · 10.0x0R16.5
  3. 8.75xR16.5 optional on 3 trims
    Check price on Amazon · 8.75xR16.5

Also listed: 9.50xR16.5

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Trims sold in 1975
3
Generation
C/K series

3 trims sold in 1975

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

GMC Suburban 2500 C/K series

1973–1991 3 trims
Suburban 2500 350 4-bbl +2 variants 160 hp · 5.7L LS9 V8 7.50x R16.5 5 fitments

Same tires and wheels on: 400 4-bbl, 454 4-bbl

Generation
C/K series · 1973–1991
Power
160 hp
Engine
5.7L LS9 V8, Petrol
Center bore
116.6 mm
Bolt pattern
8x165.1
Thread
9/16" - 18 UNF
Check price on Amazon · 7.50xR16.5 Wheels 16.5x6 ET15 · 8x165.1 · 116.6 mm on Amazon
Tire sizeRim size and bolt patternPressure, psi
7.50x R16.5Rim 16.5x6 ET15 8x165.1–
7.50x R16.5Rim 16.5x6 ET15 8x165.1–
8.75x R16.5Rim 16.5x6 ET15 8x165.1–
9.50x R16.5Rim 16.5x6.75 ET0 8x165.1–
10.0x0 R16.5Rim 16.5x8.25 ET0 8x165.1–
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 1975
3
Generation
C/K series
Other years
All years (1973–2006)

Considering a different size?

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