1966 Alfa Romeo GT tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 4x108 on every 1966 trim.

Tires for the 1966 Alfa Romeo GT

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

185/70R14 Best-rated standard on 4 trims

Check price on Amazon · 185/70R14
195/60R15 Best-rated optional on 4 trims

Check price on Amazon · 195/60R15

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Trims sold in 1966: 4
Generation: 105/115
Other years: 1963
1964
1965
1966
1967
1968
1969
1970
All years (1963–2010)

4 trims sold in 1966

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

Alfa Romeo GT 105/115

1963–1977 4 trims

GT 1300 +3 variants 86 hp · AR00530 I4 185/70R14 88H 2 fitments

Same tires and wheels on: 1600, A 1600

Generation: 105/115 · 1963–1977
Power: 86 hp
Engine: AR00530 I4, Petrol
Center bore: 63.4 mm
Bolt pattern: 4x108
Thread: M12 x 1.5

Check price on Amazon · 185/70R14 Wheels 14x5.5 ET38 · 4x108 · 63.4 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
185/70R14 88H	Rim 14x5.5 ET38 ~~4x108~~	29 psi
195/60R15 88H	Rim 15x6 ET38 ~~4x108~~	29 psi

How to read 88H: 88 is the load index (up to 1,235 lb / 560 kg per tire) and H the speed rating (up to 130 mph / 210 km/h). ET38 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres. Compare offsets in the wheel offset calculator.

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.