Tyres by size
235/40 R18 tyres
One 235/40 R18 tyre from Dunlop, available by request with a personal fitting quote. The size means a 235 mm tread width, a sidewall 40% of that width, and a 18-inch wheel diameter. Every option here is a summer tyre.
- Mobile tyre fitting, across the UK — we come to you
- Price agreed before work starts
The 235/40 R18 tyre in our reference range
- Summer · PerformanceAsk for availability
Need something else in 235/40 R18? We can source more brands and patterns to order — ask our team about your tyre size or message us on WhatsApp and we will confirm options and a fitted price.
Understanding this size
- 235 — width
- The tread is 235 millimetres across, sidewall to sidewall.
- 40 — profile
- The sidewall height is 40% of the tread width — the aspect ratio.
- R18 — rim
- Radial construction, fitting a 18-inch wheel.
- 95Y — load and speed
- The load index states the weight each tyre may carry; the letter is its maximum rated speed.
Every marking on the sidewall is decoded in our guide to reading tyre size markings.
Other sizes in our reference range
Always fit the exact size printed on your sidewall — a different size can affect handling, your speedometer and your insurance. If you are unsure, ask our team to help check your size.
Not listed here? Browse all tyre sizes in our reference range.