2021 Cadillac CT4-V tire and wheel sizes, bolt pattern and tire pressure

Bolt patterns 5x115 or 5x120, depending on the market version.

Tires for the 2021 Cadillac CT4-V

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

235/40R18 front + 265/35R18 rear Best-rated standard on 1 trim

Check price on Amazon · 235/40R18 front Check price on Amazon · 265/35R18 rear
255/35R18 front + 275/35R18 rear Best-rated standard on 1 trim

Check price on Amazon · 255/35R18 front Check price on Amazon · 275/35R18 rear
235/40R18 Best-rated optional on 1 trim

Check price on Amazon · 235/40R18

Also listed: 235/35R19 235/35R19 + 265/30R19 255/30R19 + 275/30R19

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Trims sold in 2021: 2
Generation: GM Alpha
Other years: 2020
2021
2022
2023
2024
2025
2026
All years (2020–2026)

2 trims sold in 2021

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

Cadillac CT4-V GM Alpha

2020–2023 2 trims

CT4-V 2.7T 325 hp · 2.7L L3B I4 235/40R18 95Y / 265/35R18 97Y 4 fitments

Generation: GM Alpha · 2020–2023
Power: 325 hp
Engine: 2.7L L3B I4, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

Check price on Amazon · 235/40R18 Check price on Amazon · 265/35R18 Wheels 18x8 ET35 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
Front235/40R18 95Y	Rim 18x8 ET35 ~~5x115~~	41 psi
Rear265/35R18 97Y	Rim 18x8.5 ET40 ~~5x115~~	46 psi
Front235/35R19 91Y	Rim 19x8 ET35 ~~5x115~~	41 psi
Rear265/30R19 93Y	Rim 19x9 ET40 ~~5x115~~	46 psi
235/40R18 95Y	Rim 18x8 ET35 ~~5x115~~	41 psi
235/35R19 91Y	Rim 19x8 ET35 ~~5x115~~	41 psi

How to read 95Y: 95 is the load index (up to 1,521 lb / 690 kg per tire) and Y the speed rating (up to 186 mph / 300 km/h). ET35 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

CT4-V 3.6T 472 hp · 3.6L LF4 V6 255/35R18 94Y / 275/35R18 99Y 2 fitments

Generation: GM Alpha · 2020–2023
Power: 472 hp
Engine: 3.6L LF4 V6, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

Check price on Amazon · 255/35R18 Check price on Amazon · 275/35R18 Wheels 18x9 ET28 · 5x120 · 66.9 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
Front255/35R18 94Y	Rim 18x9 ET28 ~~5x120~~	41 psi
Rear275/35R18 99Y	Rim 18x9.5 ET48 ~~5x120~~	41 psi
Front255/30R19 91Y	Rim 19x9 ET25 ~~5x120~~	41 psi
Rear275/30R19 96Y	Rim 19x10 ET45 ~~5x120~~	41 psi

How to read 94Y: 94 is the load index (up to 1,477 lb / 670 kg per tire) and Y the speed rating (up to 186 mph / 300 km/h). ET28 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.
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.