2012 Cadillac STS tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x115 on every 2012 trim.

Tires for the 2012 Cadillac STS

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

235/50R17 front + 255/45R17 rear Best-rated standard on 1 trim

Check price on Amazon · 235/50R17 front Check price on Amazon · 255/45R17 rear
235/50R17 Best-rated optional on 1 trim

Check price on Amazon · 235/50R17
235/50R18 front + 255/45R18 rear Best-rated optional on 1 trim

Check price on Amazon · 235/50R18 front Check price on Amazon · 255/45R18 rear

Also listed: 245/40R19 + 275/35R19

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Trims sold in 2012: 1
Generation: GM Sigma ll
Other years: 2005
2006
2007
2008
2009
2010
2011
2012
All years (2004–2012)

1 trim sold in 2012

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

Cadillac STS GM Sigma ll

2008–2012 1 trim

STS 3.6i 302 hp · 3.6L LY7 V6 235/50R17 95W / 255/45R17 95W 4 fitments

Generation: GM Sigma ll · 2008–2012
Power: 302 hp
Engine: 3.6L LY7 V6, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

Check price on Amazon · 235/50R17 Check price on Amazon · 255/45R17 Wheels 17x7.5 ET51 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
Front235/50R17 95W	Rim 17x7.5 ET51 ~~5x115~~	30 psi
Rear255/45R17 95W	Rim 17x8 ET51 ~~5x115~~	30 psi
Front235/50R18 97W	Rim 18x8 ET51 ~~5x115~~	30 psi
Rear255/45R18 97W	Rim 18x8 ET51 ~~5x115~~	30 psi
Front245/40R19 97Y	Rim 19x8 ET45 ~~5x115~~	30 psi
Rear275/35R19 99Y	Rim 19x9 ET45 ~~5x115~~	30 psi
235/50R17 95V	Rim 17x7.5 ET51 ~~5x115~~	30 psi

How to read 95W: 95 is the load index (up to 1,521 lb / 690 kg per tire) and W the speed rating (up to 168 mph / 270 km/h). ET51 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.
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.