245/40 R18 Tyres Norwich

We fit 245/40 R18 regularly at 100-106 Ber Street, and the questions customers ask about it are always the same: is this really my size, what do the codes after it mean, which brand should I choose, and can I have it today? The answers are below. Call 07933 900901 with the size or your registration for a quote, seven days a week.

Tyres from £40supplied and fitted, quoted by size

Same-day fittingmost sizes, while you wait

Open 7 daysMon-Sat 8-6, Sun 10-4

3-month guaranteeor 3,000 miles on workmanship

Which Cars Use 245/40 R18?

The 18-inch size on rear-drive executive cars: BMW 3 and 4 Series in run-flat form, BMW 5 Series on some wheels, Mercedes C-Class and E-Class, Audi A5 and A6, Jaguar XE and XF, Lexus GS and Volvo S90 on certain fitments, often as the rear tyre of a staggered set.

If your car is on this list, check the sidewall anyway; if it is not, check the sidewall anyway. Trims and wheel options vary, and the door label settles it.

What 245/40 R18 Means

245/40 R18 tells you three things and implies a fourth: a 245 mm wide tread, a sidewall 40 per cent as tall as that width (about 98 mm), a 18-inch wheel, and therefore an overall diameter of about 653 mm. The letters and numbers that follow on the sidewall (for example 97Y XL and 93Y) are the load index and speed rating, and they matter as much as the size itself.

Load and Speed Ratings on 245/40 R18

Common codes in this size are 97Y XL and 93Y. Load index first, speed rating second, and the rule is simple: match or exceed what the manufacturer specifies, never go under. Run-flat versions exist for some of the cars on this size; they carry an RSC, RFT, ROF, SSR or ZP marking and should be replaced like for like unless all four are changed together.

Good to know

Why do my rear 245/40 R18 tyres wear so fast? On a rear-wheel-drive car the rears transmit the power and take the load under acceleration, so two to three times the front wear rate is normal. Sensible driving and correct pressures slow it; a wheel alignment check rules out geometry adding to it.

What to Watch For on This Size

A 97 XL load index is the norm and the speed rating is Y. BMW fitments carry the star marking and are usually run-flat; Mercedes carry MO. These rear tyres do the driving on a rear-wheel-drive car and wear two or three times faster than the fronts, so budget for pairs. Pressures on run-flats are often higher than owners expect, and an under-inflated run-flat gives no warning before it fails.

Brands Available in 245/40 R18

Premium and performance mid-range: Michelin Pilot Sport, Continental SportContact, Goodyear Eagle F1, Bridgestone Potenza and Turanza, Pirelli P Zero and Cinturato, Hankook Ventus S1 evo, Falken Azenis, Kumho Ecsta, Yokohama Advan, Nexen N'Fera and Vredestein Ultrac, with run-flat versions from the premium five.

Each brand has its own page explaining who makes it and who it suits; the full brand list is tiered honestly. On the phone we quote two or three options in your size with the EU label for each, so you can weigh wet grip and noise against price.

Other 18-Inch Sizes

Sizes on the same rim diameter that are often confused with this one, each with its own page: 225/40 R18, 225/45 R18, 235/60 R18, 235/40 R18, 235/50 R18, 245/45 R18. See the full tyre size guide.

Fitting 245/40 R18 at Ber Street

One phone call books it: 07933 900901, the size or registration, and a time. If the tyre is not on the shelf it is normally with us the next working day. Fitting is done at 100-106 Ber Street with a new valve, computer balancing, hand torqueing and disposal of the old tyre, guaranteed for 3 months or 3,000 miles. Free parking, open seven days.

How Tyre Fitting Works at Ber Street