Tyres by size
235/40 R18 tyres
One 235/40 R18 tyre from Dunlop, priced at £139.99 per tyre, fully fitted. 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
- 6-month tyre guarantee
The 235/40 R18 tyre we stock
- Summer · PerformanceIn stock
Need something else in 235/40 R18? We can source more brands and patterns to order — check your size by registration 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 we stock
Always fit the exact size printed on your sidewall — a different size can affect handling, your speedometer and your insurance. If you are unsure, check your size by registration.
Not listed here? Browse all tyre sizes we stock.