What does 225/40 R18 mean?

225 is the width of the tyre in millimetres. 40 is the height of the sidewall as a percentage of that width. R means radial construction, and 18 is the diameter of the wheel in inches. The load index and speed rating after the size, such as 91V, should match or exceed what your car handbook lists.

Can you fit 225/40 R18 tyres at my home or work?

Yes. Our fitters come to your driveway, street or workplace in a fully equipped van and fit, balance and check the tyres on the spot. Enter your postcode to see the dates available near you.

How is the price worked out?

Each price is per tyre and fully fitted: fitting, balancing, a new valve and disposal of the old tyre, with VAT included. Fitting two or four tyres at once lowers the price per tyre. The price for your postcode is shown before you book, and it is the price you pay.

225/40 R18 tyres, fitted at your home or work

From £79.99 fitted 23 tyres from 10 brands

Every price is per tyre and fully fitted by our fitters at your driveway, street or workplace, with VAT included. Enter your postcode to see the dates and prices near you.

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225/40 R18 tyres and fitted prices

Prices checked 2 November 2026. The price for your postcode is confirmed before you book.

Budget (3)

Mid-range (1)

Firestone Roadhawk
225/40 R1892Y XL · Summer
£107.99
per tyre, fitted

Premium (19)

See prices for my postcode

225/40 R18 tyres: common questions

What does 225/40 R18 mean?: 225 is the width of the tyre in millimetres. 40 is the height of the sidewall as a percentage of that width. R means radial construction, and 18 is the diameter of the wheel in inches. The load index and speed rating after the size, such as 91V, should match or exceed what your car handbook lists.
Can you fit 225/40 R18 tyres at my home or work?: Yes. Our fitters come to your driveway, street or workplace in a fully equipped van and fit, balance and check the tyres on the spot. Enter your postcode to see the dates available near you.
How is the price worked out?: Each price is per tyre and fully fitted: fitting, balancing, a new valve and disposal of the old tyre, with VAT included. Fitting two or four tyres at once lowers the price per tyre. The price for your postcode is shown before you book, and it is the price you pay.

Other popular sizes

All tyre brands →How to read a tyre size →