1966 Pontiac Bonneville tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x127 on every 1966 trim.

Tires for the 1966 Pontiac Bonneville

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

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

1965–1970 USA 2 trims

Bonneville 389 cid (Hardtop) +1 variant 6.4 L V8 Petrol 6.4 L V8 215/80SR14 2 fitments

Same tires and wheels on: 421 cid (Hardtop)

Check price on Amazon · 215/80R14 Wheels 14x6 ET19 · 5x127 · 78.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
215/80SR14	Rim 14x6 ET19 5x127	–
225/70SR15	Rim 15x7 ET6 5x127	–

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.