tirewheelguide

2020 Cadillac CT4 tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x115 on every 2020 trim.

Tires for the 2020 Cadillac CT4

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

  1. 235/40R18 front + 265/35R18 rear Best-rated standard on 3 trims · USA, China
    Check price on Amazon · 235/40R18 front Check price on Amazon · 265/35R18 rear
  2. 225/45R17 Best-rated optional on 3 trims · USA, China
    Check price on Amazon · 225/45R17
  3. 235/40R18 Best-rated optional on 3 trims · USA, China
    Check price on Amazon · 235/40R18

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

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Trims sold in 2020
3
Generation
GM Alpha sold in 2 market versions

3 trims sold in 2020

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

Cadillac CT4 GM Alpha

2020–2023 3 trims

USA

2 trims
CT4 2.0T 237 hp · 2.0L LSY I4 235/40R18 94Y / 265/35R18 97Y 6 fitments
Generation
GM Alpha · 2020–2023
Market
USA
Power
237 hp
Engine
2.0L LSY 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 sizeRim size and bolt patternPressure, psi
Front235/40R18 94YRim 18x8 ET35 5x11532 psi
Rear265/35R18 97YRim 18x8.5 ET40 5x11538 psi
Front235/35R19 91YRim 19x8 ET35 5x11533 psi
Rear265/30R19 93YRim 19x9 ET40 5x11538 psi
225/45R17 91VRim 17x8 ET32 5x11532 psi
235/40R18 91VRim 18x8 ET35 5x11533 psi
235/40R18 95YRim 18x8 ET35 5x11541 psi
235/35R19 91VRim 19x8 ET35 5x11541 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). ET35 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

CT4 2.7T 310 hp · 2.7L L3B I4 235/40R18 95Y / 265/35R18 97Y 6 fitments
Generation
GM Alpha · 2020–2023
Market
USA
Power
310 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 sizeRim size and bolt patternPressure, psi
Front235/40R18 95YRim 18x8 ET35 5x11533 psi
Rear265/35R18 97YRim 18x8.5 ET40 5x11538 psi
Front235/35R19 91YRim 19x8 ET35 5x11532 psi
Rear265/30R19 93YRim 19x9 ET40 5x11538 psi
235/40R18 91VRim 18x8 ET35 5x11533 psi
225/45R17 91VRim 17x8 ET32 5x11532 psi
235/40R18 95YRim 18x8 ET35 5x11541 psi
235/35R19 91VRim 19x8 ET35 5x11541 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.

China

1 trim
CT4 2.0T 233 hp · 2.0L LSY I4 235/40R18 94Y / 265/35R18 97Y 6 fitments
Generation
GM Alpha · 2020–2023
Market
China
Power
233 hp
Engine
2.0L LSY 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 sizeRim size and bolt patternPressure, psi
Front235/40R18 94YRim 18x8 ET35 5x11532 psi
Rear265/35R18 97YRim 18x8.5 ET40 5x11538 psi
Front235/35R19 91YRim 19x8 ET35 5x11533 psi
Rear265/30R19 93YRim 19x9 ET40 5x11538 psi
225/45R17 91VRim 17x8 ET32 5x11532 psi
235/40R18 91VRim 18x8 ET35 5x11533 psi
235/40R18 95YRim 18x8 ET35 5x11541 psi
235/35R19 91VRim 19x8 ET35 5x11541 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). ET35 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.
Trims sold in 2020
3
Generation
GM Alpha sold in 2 market versions
Other years
All years (2020–2026)

Considering a different size?

Compare your current tire size with the one you want: diameter change, ground clearance and speedometer error.

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