2021 Cadillac CT5 tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x120 on every 2021 trim.

Tires for the 2021 Cadillac CT5

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

245/45R18 Best-rated standard on 3 trims · USA, China

Check price on Amazon · 245/45R18
245/40R19 Best-rated optional on 3 trims · USA, China

Check price on Amazon · 245/40R19
255/35R20 Best-rated optional on 3 trims · USA, China

Check price on Amazon · 255/35R20

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Trims sold in 2021: 3
Generation: GM Alpha sold in 2 market versions
Other years: 2019
2020
2021
2022
2023
2024
2025
2026
All years (2019–2026)

3 trims sold in 2021

Sold in 2 market versions. Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

Cadillac CT5 GM Alpha

2019–2023 3 trims

USA

2 trims

CT5 2.0T +1 variant 237 hp · 2.0L LSY I4 245/45R18 96V 4 fitments

Same tires and wheels on: 3.0T

Generation: GM Alpha · 2019–2023
Market: USA
Power: 237 hp
Engine: 2.0L LSY I4, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

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

Tire size	Rim size and bolt pattern	Pressure, psi
245/45R18 96V	Rim 18x8.5 ET29 ~~5x120~~	36 psi
245/40R19 94V	Rim 19x8.5 ET29 ~~5x120~~	36 psi
245/40R19 94Y	Rim 19x8.5 ET29 ~~5x120~~	41 psi
255/35R20 97W	Rim 20x8.5 ET38 ~~5x120~~	44 psi

How to read 96V: 96 is the load index (up to 1,565 lb / 710 kg per tire) and V the speed rating (up to 149 mph / 240 km/h). ET29 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

China

1 trim

CT5 2.0T 233 hp · 2.0L LSY I4 245/45R18 96V 4 fitments

Generation: GM Alpha · 2019–2023
Market: China
Power: 233 hp
Engine: 2.0L LSY I4, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

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

Tire size	Rim size and bolt pattern	Pressure, psi
245/45R18 96V	Rim 18x8.5 ET29 ~~5x120~~	36 psi
245/40R19 94V	Rim 19x8.5 ET29 ~~5x120~~	36 psi
245/40R19 94Y	Rim 19x8.5 ET29 ~~5x120~~	41 psi
255/35R20 97W	Rim 20x8.5 ET38 ~~5x120~~	44 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.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.