Tyre Size Guide

225/40 R18 Tyre Pressure

The tyre size 225/40 R18 is used on a wide range of vehicles, from hatchbacks to family saloons. While the physical tyre is the same, the recommended pressure varies depending on the weight of the vehicle and the manufacturer's suspension tuning.

Typical pressure for 225/40 R18

Front Axle Range

34–36PSI

Rear Axle Range

32–34PSI

* Data based on 34 vehicle configurations in our database using this tyre size. Always check your own vehicle's sticker.

Vehicles using 225/40 R1834 models

Audi A4

2023 • B9

Front 35 psi / Rear 33 psi

Saloon

Audi A6

2021 • C8

Front 36 psi / Rear 34 psi

Saloon

Audi A4

2020 • B9

Front 35 psi / Rear 33 psi

Saloon

Audi A6

2018 • C8

Front 36 psi / Rear 34 psi

Saloon

Audi A4

2017 • B9

Front 35 psi / Rear 33 psi

Saloon

Audi A4

2015 • B9

Front 35 psi / Rear 33 psi

Saloon

BMW 3 Series

2024 • G20

Front 35 psi / Rear 33 psi

Saloon

BMW 3 Series

2022 • G20

Front 35 psi / Rear 33 psi

Saloon

BMW 5 Series

2022 • G30

Front 36 psi / Rear 34 psi

Saloon

BMW 3 Series

2019 • G20

Front 35 psi / Rear 33 psi

Saloon

BMW 5 Series

2019 • G30

Front 36 psi / Rear 34 psi

Saloon

BMW 3 Series

2017 • F30

Front 35 psi / Rear 33 psi

Saloon

BMW 5 Series

2016 • G30

Front 36 psi / Rear 34 psi

Saloon

BMW 3 Series

2015 • F30

Front 35 psi / Rear 33 psi

Saloon

Ford Mondeo

2020 • Mk4

Front 34 psi / Rear 32 psi

Saloon

Ford Mondeo

2018 • Mk4

Front 34 psi / Rear 32 psi

Saloon

Ford Mondeo

2016 • Mk4

Front 34 psi / Rear 32 psi

Saloon

Lexus IS

2017 • Mk3

Front 36 psi / Rear 34 psi

Saloon

Mercedes-Benz C-Class

2023 • W206

Front 35 psi / Rear 33 psi

Saloon

Mercedes-Benz E-Class

2023 • W213

Front 36 psi / Rear 34 psi

Saloon

Mercedes-Benz C-Class

2021 • W206

Front 35 psi / Rear 33 psi

Saloon

Mercedes-Benz E-Class

2020 • W213

Front 36 psi / Rear 34 psi

Saloon

Mercedes-Benz C-Class

2017 • W205

Front 35 psi / Rear 33 psi

Saloon

Mercedes-Benz E-Class

2016 • W213

Front 36 psi / Rear 34 psi

Saloon

Skoda Superb

2022 • Mk3

Front 35 psi / Rear 33 psi

Saloon

Skoda Superb

2019 • Mk3

Front 35 psi / Rear 33 psi

Saloon

Skoda Superb

2015 • Mk3

Front 35 psi / Rear 33 psi

Saloon

Vauxhall Insignia

2019 • Mk2

Front 34 psi / Rear 32 psi

Saloon

Vauxhall Insignia

2017 • Mk2

Front 34 psi / Rear 32 psi

Saloon

Vauxhall Insignia

2015 • Mk1

Front 34 psi / Rear 32 psi

Saloon

Volkswagen Passat

2023 • B8

Front 35 psi / Rear 33 psi

Saloon

Volkswagen Passat

2021 • B8

Front 35 psi / Rear 33 psi

Saloon

Volkswagen Passat

2019 • B8

Front 35 psi / Rear 33 psi

Saloon

Volkswagen Passat

2016 • B8

Front 35 psi / Rear 33 psi

Saloon

Why does 225/40 R18 pressure vary?

Even though many cars share the 225/40 R18 tyre size, the recommended pressure depends on:

Vehicle Weight: A heavier car needs more air pressure to support its mass and maintain the tyre's shape.
Load: Carrying passengers or luggage significantly increases the required pressure on the rear tyres.
Handling: Manufacturers tune tyre pressure to achieve specific steering response and comfort levels.