1978 Triumph TR8 tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 4x95.25 on every 1978 trim.

Tires for the 1978 Triumph TR8

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

Also listed: 205/50R15

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Open a trim for its tire and rim sizes, bolt pattern and tire pressure.

1978–1981 USA 1 trim

TR8 3.5 135 hp · 3.5 L V8 Petrol 3.5 L V8 185/70HR13 5 fitments

Check price on Amazon · 185/70R13 Wheels 13x5.5 ET25 · 4x95.25 · 57.1 mm on Amazon

Fit	Tire size	Rim size and bolt pattern	Pressure, psi
OE	185/70HR13	Rim 13x5.5 ET25 ~~4x95.25~~	28 psi
Alt	185/65HR14	Rim 14x5.5 ET25 ~~4x95.25~~	29 psi
Alt	185/65HR14	Rim 14x6 ET25 ~~4x95.25~~	26 F / 29 R psi
Alt	195/55HR15	Rim 15x6 ET25 ~~4x95.25~~	29 psi
Alt	205/50VR15	Rim 15x6.5 ET20 ~~4x95.25~~	29 psi

What these columns mean

OE fitment: The package fitted at the factory for that trim.
Alternative: A size the car accepts without modification — plus-sizing, winter setups or optional wheels.
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.