1990 BMW Alpina B12 tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x120 on every 1990 trim.

Tires for the 1990 BMW Alpina B12

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

235/45R17 front + 265/40R17 rear Best-rated standard on 2 trims

Check price on Amazon · 235/45R17 front Check price on Amazon · 265/40R17 rear
245/40R18 front + 285/35R18 rear Best-rated optional on 1 trim

Check price on Amazon · 245/40R18 front Check price on Amazon · 285/35R18 rear

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Trims sold in 1990: 2
Generations: E31 E32
Other years: 1988
1989
1990
1991
1992
1993
1994
1995
All years (1988–2001)

2 trims sold in 1990

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

BMW Alpina B12 E31

1990–1996 1 trim

B12 B12 5.0 346 hp · M70B50 V12 235/45R17 93Y / 265/40R17 96Y 2 fitments

Generation: E31 · 1990–1996
Power: 346 hp
Engine: M70B50 V12, Petrol
Center bore: 72.6 mm
Bolt pattern: 5x120
Thread: M12 x 1.5

Check price on Amazon · 235/45R17 Check price on Amazon · 265/40R17 Wheels 17x8.5 ET12 · 5x120 · 72.6 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
Front235/45R17 93Y	Rim 17x8.5 ET12 ~~5x120~~	38 psi
Rear265/40R17 96Y	Rim 17x10 ET28 ~~5x120~~	38 psi
Front245/40R18 93Y	Rim 18x9 ET12 ~~5x120~~	38 psi
Rear285/35R18 97Y	Rim 18x10.5 ET20 ~~5x120~~	38 psi

How to read 93Y: 93 is the load index (up to 1,433 lb / 650 kg per tire) and Y the speed rating (up to 186 mph / 300 km/h). ET12 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres. Compare offsets in the wheel offset calculator.

BMW Alpina B12 E32

1988–1994 1 trim

B12 B12 5.0 346 hp · M70B50 V12 235/45R17 93Y / 265/40R17 96Y 2 fitments

Generation: E32 · 1988–1994
Power: 346 hp
Engine: M70B50 V12, Petrol
Center bore: 72.6 mm
Bolt pattern: 5x120
Thread: M12 x 1.5

Check price on Amazon · 235/45R17 Check price on Amazon · 265/40R17 Wheels 17x8.5 ET12 · 5x120 · 72.6 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
Front235/45R17 93Y	Rim 17x8.5 ET12 ~~5x120~~	38 psi
Rear265/40R17 96Y	Rim 17x9.5 ET24 ~~5x120~~	38 psi
Front235/45R17 93Y	Rim 17x8.5 ET14 ~~5x120~~	38 psi
Rear265/40R17 96Y	Rim 17x10 ET28 ~~5x120~~	38 psi

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.
Staggered: A wider tire on the rear axle than the front. Front-to-back rotation is not possible.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.