Choose Your Tyre Size
Postcode & Tyre Size
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Choose Your Tyre Size
Choose Your Tyre Size
Ways to apply
- Build your basket and select Trade Credit at checkout.
- Apply below to check your eligibility.
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- If eligible, receive your Trade Credit limit instantly.
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*Only required on your first Trade Credit purchase.
Pay on account
- Complete your purchase and pay on account at the end of the following month.
- Enjoy no interest or transaction fees**.
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Find suitable 245/40 R18 tyres with Halfords
Finding the right size tyres for your vehicle can be tricky. Lucky for you, Halfords stock an extensive range of 245/40 R18 tyres. With plenty of tyre brands to choose from, you'll find the right 245/40 R18 tyres that suit your needs.
From Apollo to Landsail, our extensive range of size 245/40 R18 tyres features the highest-quality brands. Not sure whether size 245/40 R18 tyres are right for your car? Use our handy vehicle registration number tool to check. If your car’s MOT is due, why not make life easier by booking a combined service & MOT? You can find your nearest garage using our store locator.
What does 245 40 R18 mean?
The size "245/40 R18" provides information about the tyre's dimensions and specifications:
- 245: This is the width of the tyre in millimetres, measuring from sidewall to sidewall. A 245 mm width indicates a medium-width tyre, commonly used in passenger vehicles.
- 40: This number is the aspect ratio, which is the height of the tyre's sidewall expressed as a percentage of the tyre's width. In this case, the sidewall height is 40% of 245 mm.
- R18: This stands for Radial, indicating the construction type of the tyre. Radial tyres are the most common type, known for their durability and performance. 18 is the diameter of the wheel rim in inches that the tyre is designed to fit.
Common uses of 245/40 R18 tyres
245/40 R18 tyres are widely used in a variety of vehicles. Popular car models equipped with this tyre size include the A-Class, C-Class, E-Class, and many more.
How to ensure 245/40 R18 tyres are right for your vehicle
Consult your vehicle’s manual
Your owner’s manual provides detailed information on the recommended tyre size for your vehicle. Always refer to it before purchasing new tyres to ensure compatibility and avoid potential safety risks. In this case, check the recommended tyre size before purchasing your tyres.
Check the tyre sidewall
Existing tyres have their size printed on the sidewall. Ensure that any new tyres match these specifications unless advised otherwise by a trusted professional.
Ask a Halfords expert
If you’re unsure whether 245/40 R18 tyres are the right size for your vehicle, use our handy vehicle registration number tool to check. You can also pop into one of our local stores or garages, where one of our trusted experts can help.