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Identify the size of your tyre
The exact dimensions of a tyre can be found on the sidewall printed mark. The graphic shows how to read properties and dimensions of the tyre:
 
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SPEED INDEX:
The speed index indicates the maximum speed intended for the tyre. Up to this value, the manufacturer guarantees optimum operation with the appropriate tyre pressure. The maximum speed allowed for this vehicle is given in the vehicle owner's manual; this information can be used to select the appropriate speed index for the tyre. The speed index is the last mark on the sidewall of the tyre.
 
Load Index
Permissible maximum axle load per tyre in kg. To be found in the registration certificate or vehicle registration document or read directly from the tyre (two-digit number). It is permitted to fit a tyre with a higher load index.
 
Driving safety despite puncture
Runflat tyres are puncture-resistant tyres with reinforced sidewalls. This creates the so-called run-flat property. In the event of damage, this allows the vehicle to continue driving up to a distance of approx. 100 km (and even beyond depending on the product) at a maximum speed of 80 km/h, even if the pressure has been completely lost. Run-flat tyres even prevent the tyre rubber from jumping off the rim in the event of a loss of air pressure. A flat tyre is therefore still a flat tyre, but it loses some of its drama. Note: All run-flat tyres are marked with the symbol "RSC" (Runflat System Component) and may only be fitted in vehicles with a functioning air pressure control system!
 
Tyres with increased load capacity
Reinforced tyres are designed for higher loads than normal tyres. They can be identified by the designation 'RF' (reinforced) or also 'XL' or 'Extra Load'. They are used on vans, minibuses, off-road vehicles, etc. However, their mounting alone does not automatically result in higher load capacity but also requires a correspondingly higher air pressure. Furthermore, the load capacity index specified in the vehicle documents continues to apply.
 
Tyres with extra high load capacity
The "C" in the term C tyres stands for "commercial". These tyres are specially designed for commercial vehicles. These can be, for example, lighter trucks, delivery vans, flatbed trucks or panel vans. In other words: vehicles that have to move higher loads at a comparatively lower speed. The multi-ply reinforced C tyres are therefore even more load-bearing than reinforced tyres.
 
Mobility-optimised tyres
A tyre with a sealing layer on the opposite side of the tyre tread. In the event of a puncture (e.g. by a nail), this layer blocks any loss of air, even if the foreign body causing the puncture is still in the tyre. It is not necessary to stop or change the tyres immediately at the roadside.
 
Mobility-optimised tyres
A tyre with a sealing layer on the opposite side of the tyre tread. In the event of a puncture (e.g. by a nail), this layer blocks any loss of air, even if the foreign body causing the puncture is still in the tyre. It is not necessary to stop or change the tyres immediately at the roadside.
 
Tyres optimised for electric vehicles.
Tyre developed for electric vehicles. These tyres can also be used without hesitation on vehicles with other drive systems.
 
x
Original equipment quality: optimum adjustment to the vehicle
Tyres with a special OEM marking on the sidewall, e.g. "MO" for Mercedes-Benz, were developed in cooperation with a specific car manufacturer and the tyre industry. These tyres have been homologated by the vehicle manufacturer and are a perfect match for a specific model. They have been specially designed to highlight or further improve the performance characteristics of the car in question, thus representing the culmination of a state-of-the-art fine-tuning process that perfectly complements the latest technological developments in the automotive industry. Tyres with manufacturer's markings can of course also be used on other vehicles.
 

Our offer for   235/40  18     

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Prices include VAT and delivery within Ireland

Bridgestone Potenza RE 050 A
Bridgestone
Bridgestone
Potenza RE 050 A
235/40 ZR18 95(Y) XL N1, EVc

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip BNoise emissions 72dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com offers over 430 000 tests firsthand - from consumers for consumers.

(84)
Average based on 84 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven30383184
20.09.2021fromYuri
Too loud
16.03.2013fromJOHN Lewis
PORSCHE FIT THESE TYRES ON ALL NEW CAYMANS AND THEY ARE A PERFECT MATCH FOR THE CAR!!
12.03.2013fromAlan
very poor performance on wet. Very low mileage. Too expensive for what you get. Could't cope whit 260 hp to manage. Definitely not a high performance tyre.
06.03.2013fromMark
Excellent high performance dry weather tyre but the wear rate is a little too high. At this price point there are many options.
(84)

Reifentest.com

just  142.43 £
limited stock
Details
Michelin Pilot Sport 4
Michelin
Michelin
Pilot Sport 4
235/40 ZR18 95(Y) XL MO1, EV Suitable

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com offers over 430 000 tests firsthand - from consumers for consumers.

(22)
Average based on 22 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven3667908
18.04.2026fromJ Lynch
Smooth ride. Incredible grip that even prevents the traction control from engaging in brisk pull aways from a standstill. (My car is FWD). The only negative with the Michelin Pilot Sport 4 is that tyre wear does appear to be slightly higher than with a regular tyre.
15.02.2024fromDavid Wood
Flourless great in all conditions even got us home at 40 to 50 mph after running over something in the fast lane of the M5 northbound. Can’t praise enough.
09.02.2023fromJohn Molloy
These tyres are noticeable quieter than my previous tyres, Kumho Exta. Cornering grip is better and fuel consumption is slightly better
09.12.2021fromNicholas
I've driven roughly 22,000km as this was when i would of rebuilt the engine and got the car ready for road, by far these are the best tyres I've ever experienced on a car, I had used continentals and dunlop's beforehand, 2 competitors to Michelin, and before now, I always struggled with understeer under sharp cornering after periods of rain, with the PS4's, this has been completely eradicated, wet grip is by far the best in its class, with not much coming against it, usually the car would also break grip in wet conditions when in low gears speeding up, this has also vanished, in terms of lifespan, there is roughly 5mm left on the tyres after 22k km, so lifespan is also excellent. I am very confident in using these tyres and will be purchasing again once it comes time to replace.
(22)

Reifentest.com

just  146.69 £
available
Details
Kumho Ecsta Sport PS72
Kumho
Kumho
Ecsta Sport PS72
235/40 ZR18 95Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 72dB
just  160.38 £
available
Details
Michelin Pilot Sport 4
Michelin
Michelin
Pilot Sport 4
235/40 ZR18 95Y XL, EV Suitable

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com offers over 430 000 tests firsthand - from consumers for consumers.

(22)
Average based on 22 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven3667908
18.04.2026fromJ Lynch
Smooth ride. Incredible grip that even prevents the traction control from engaging in brisk pull aways from a standstill. (My car is FWD). The only negative with the Michelin Pilot Sport 4 is that tyre wear does appear to be slightly higher than with a regular tyre.
15.02.2024fromDavid Wood
Flourless great in all conditions even got us home at 40 to 50 mph after running over something in the fast lane of the M5 northbound. Can’t praise enough.
09.02.2023fromJohn Molloy
These tyres are noticeable quieter than my previous tyres, Kumho Exta. Cornering grip is better and fuel consumption is slightly better
09.12.2021fromNicholas
I've driven roughly 22,000km as this was when i would of rebuilt the engine and got the car ready for road, by far these are the best tyres I've ever experienced on a car, I had used continentals and dunlop's beforehand, 2 competitors to Michelin, and before now, I always struggled with understeer under sharp cornering after periods of rain, with the PS4's, this has been completely eradicated, wet grip is by far the best in its class, with not much coming against it, usually the car would also break grip in wet conditions when in low gears speeding up, this has also vanished, in terms of lifespan, there is roughly 5mm left on the tyres after 22k km, so lifespan is also excellent. I am very confident in using these tyres and will be purchasing again once it comes time to replace.
(22)

Reifentest.com

just  161.13 £
limited stock
Details
Michelin Pilot Sport PS2
Michelin
Michelin
Pilot Sport PS2
235/40 ZR18 95(Y) XL N4, EV Suitable

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip BNoise emissions 69dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com offers over 430 000 tests firsthand - from consumers for consumers.

(89)
Average based on 89 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven19107200
09.02.2023fromIan Broad
The tyres are Porsche recommended for my car, so it was best to fit the correct tyre, as it would have had at factory. My car had covered only 6900 miles when I purchased it. The original tyres were on the car.
30.09.2015fromJohn ashton
Really good gripping tyre well worth the extra pennies :)
09.08.2014fromAndyH
Always a good idea to but the best tyres you can and these are great. Only downside is road noise which can get irritating at times
24.05.2013fromRoddie
Much more traction offered from these tyres than previous 255/40 R18 Michelin Pilot Sport 2 or the Pilot Sport 1. No feeling of poorer ride quality despite lower profile. An unexpected big jump in overall performance and the traction control light barely appears at all now- compared to all the time out of junctions with sharp left turns. Must be better compound and/or tyre carcass construction.
(89)

Reifentest.com

just  161.96 £
available
Details
Hankook Ventus evo Z Z001
Hankook
Hankook
Ventus evo Z Z001
235/40 ZR18 95(Y) XL 4PR SBL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip BNoise emissions 70dB
just  171.58 £
limited stock
Details
Nexen Winguard Sport 2
Nexen
Nexen
Winguard Sport 2
235/40 ZR18 95W XL 4PR

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip BNoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com offers over 430 000 tests firsthand - from consumers for consumers.

(13)
Average based on 13 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven3990103
17.03.2024fromMr. Terry Brown
When I purchased my vehicle (preowned) it came with Nexen tyres on all four corners. I had to change the two front tyres after a few years and choose Goodyears. Last year I had to change the front tyres again because the Goodyears had worn considerably, whilst still having the same Nexens on the rear of the car since I purchased it. Hence stick with the Nexens. When I need to change the rear tyres I will definitely choose Nexens.
01.06.2023fromRichard Chappell
I was not sure about purchasing these tyres at 1st, but I'm pleased I gave them a go as they have performed brilliantly, Even tyre wear all the way around, kept good shape and performed very well.
10.05.2023fromAndy
Low noise (quieter than the continentals the car had as standard). Good grip all weather tyre. Had several Winguard sports before. Recommended.
19.04.2021fromAlan Bunting
Excellent tyres highly recommend
(13)

Reifentest.com

just  212.28 £
available
Details
Michelin Pilot Sport Cup 2
Michelin
Michelin
Pilot Sport Cup 2
235/40 ZR18 95(Y) XL, EV Suitable

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip CNoise emissions 70dB
just  225.20 £
limited stock
Details
Bridgestone Potenza Race
Bridgestone
Bridgestone
Potenza Race
235/40 ZR18 95(Y) XL, EVc

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip CNoise emissions 70dB
just  258.28 £
limited stock
Details
Hankook Ventus evo K137
Hankook
Hankook
Ventus evo K137
235/40 ZR18 95Y XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 70dB
just  348.48 £
limited stock
Details
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Prices include VAT and delivery within mainland UK (excl. Scottish Highlands).

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