2018 Cadillac XTS tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x120 on every 2018 trim.

Tires for the 2018 Cadillac XTS

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

245/40R20 Best-rated standard on 1 trim · optional on 1

Check price on Amazon · 245/40R20
245/45R19 Best-rated standard on 1 trim

Check price on Amazon · 245/45R19
255/35R21 Best-rated optional on 2 trims

Check price on Amazon · 255/35R21

Also listed: 255/30R22

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Trims sold in 2018: 2
Generation: GM Epsilon II
Other years: 2013
2014
2015
2016
2017
2018
2019
All years (2013–2019)

2 trims sold in 2018

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

Cadillac XTS GM Epsilon II

2018–2019 2 trims

XTS 3.6i 304 hp · 3.6L LFX V6 245/45R19 98V 3 fitments

Generation: GM Epsilon II Facelift · 2018–2019
Power: 304 hp
Engine: 3.6L LFX V6, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

Check price on Amazon · 245/45R19 Wheels 19x8.5 ET39 · 5x120 · 66.9 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
245/45R19 98V	Rim 19x8.5 ET39 ~~5x120~~	35 psi
245/40R20 95V	Rim 20x8.5 ET39 ~~5x120~~	36 psi
255/35R21 95W	Rim 21x9 ET35 ~~5x120~~	35 psi

How to read 98V: 98 is the load index (up to 1,653 lb / 750 kg per tire) and V the speed rating (up to 149 mph / 240 km/h). ET39 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres. Compare offsets in the wheel offset calculator.

XTS 3.6T 410 hp · 3.6L LF3 V6 245/40R20 95V 3 fitments

Generation: GM Epsilon II Facelift · 2018–2019
Power: 410 hp
Engine: 3.6L LF3 V6, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

Check price on Amazon · 245/40R20 Wheels 20x8.5 ET39 · 5x120 · 66.9 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
245/40R20 95V	Rim 20x8.5 ET39 ~~5x120~~	35 psi
255/35R21 95W	Rim 21x8.5 ET35 ~~5x120~~	36 psi
255/30R22 95Y	Rim 22x9 ET32 ~~5x120~~	36 psi

How to read 95V: 95 is the load index (up to 1,521 lb / 690 kg per tire) and V the speed rating (up to 149 mph / 240 km/h). ET39 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

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.