2026 Cadillac CT5 tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x120 on every 2026 trim.

Tires for the 2026 Cadillac CT5

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

245/45R18 Best-rated standard on 2 trims · China, USA

Check price on Amazon · 245/45R18
245/40R19 Best-rated optional on 2 trims · China, USA

Check price on Amazon · 245/40R19
255/35R20 Best-rated optional on 2 trims · China, USA

Check price on Amazon · 255/35R20

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Sold in 2 market versions. Open a trim for its tire and rim sizes, bolt pattern and tire pressure.

2024–2027 2 trims

1 trim

CT5 2.0T (Saloon) 233 hp · 2.0 L LTG I4 Petrol 2.0 L LTG I4 245/45R18 4 fitments

Check price on Amazon · 245/45R18 Wheels 18x8.5 ET29 · 5x120 · 66.9 mm on Amazon

Fit	Tire size	Rim size and bolt pattern	Pressure, psi
OE	245/45R18	Rim 18x8.5 ET29 5x120	36 psi
OE	245/40R19	Rim 19x8.5 ET29 5x120	36 psi
Alt	245/40R19	Rim 19x8.5 ET29 5x120	41 psi
Alt	255/35R20	Rim 20x8.5 ET38 5x120	44 psi

1 trim

CT5 3.0T (Saloon) 335 hp · 3.0 L LGY V6 Petrol 3.0 L LGY V6 245/45R18 4 fitments

Check price on Amazon · 245/45R18 Wheels 18x8.5 ET29 · 5x120 · 66.9 mm on Amazon

Fit	Tire size	Rim size and bolt pattern	Pressure, psi
OE	245/45R18	Rim 18x8.5 ET29 5x120	36 psi
OE	245/40R19	Rim 19x8.5 ET29 5x120	36 psi
Alt	245/40R19	Rim 19x8.5 ET29 5x120	41 psi
Alt	255/35R20	Rim 20x8.5 ET38 5x120	44 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.