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Home  >  Summer tyres  >  255 / 40 21  >  Dunlop Tyres  >  Dunlop 255 / 40 21
Summer tyres - optimal grip guaranteed!
On dry roads or mild weather, your tyres have to face some increased demands and must always meet safety standards. Compared to winter tyres, the rubber mixture of the summer tyres is harder, even in high temperatures. Default rolling resistance and wear are smaller, resulting in a greater lifespan, comfort and increased stability. Choose now from our offer your summer tyres at an affordable price. Our portfolio includes a wide range of tyre brands
 
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.
 
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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  Dunlop    255/40  21    Summer tyres 

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Prices include VAT and delivery within Ireland

Dunlop Sport Maxx RT2
Dunlop
Dunlop
Sport Maxx RT2
255/40 ZR21 102Y XL MO BLK

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip A Noise emissions 72 dB
Client reviews rating:
Client reviews rating

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

(12)
Average based on 12 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 driven 4403095
07.08.2020 from brendan O sullivan
Good tyres but not as good as the Michelin pilot sport 4. Will be going back to the sports.
04.12.2019 from Ali
I am a High mileage driver covering all roads day and night. This is a premium summer tyre made for dry grip and wet braking. Out of a budget , midrange and premium I’ve noted , the cheapest gives me around 6000 miles. The mid ranges cover around 12000 miles and premiums last around 18000 miles. In terms of grip it always has to be premium. These are also much quieter than budget tyres. I’ve covered 25000 miles of hard driving with these tyres and they still have around 3mm left. This is the second summer I’ve purchased these tyres. Good on price as well as grip
(12)

Reifentest.com

just  233.32 £
limited stock
Details
Show all the tyres in the selected size
APlus Aerix RS01
APlus
Aerix RS01
255/40 ZR21 102Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip B Noise emissions 72 dB
just  113.55 £
available
Details
Kumho Ecsta PS71 SUV
Kumho
Kumho
Ecsta PS71 SUV
255/40 ZR21 102Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip A Noise emissions 73 dB
just  176.31 £
available
Details
Kumho Ecsta PS71 SUV
Kumho
Kumho
Ecsta PS71 SUV
255/40 ZR21 102Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip A Noise emissions 73 dB
just  180.36 £
available
Details
Kumho Crugen HP91
Kumho
Kumho
Crugen HP91
255/40 ZR21 102Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip C Noise emissions 73 dB
Client reviews rating:
Client reviews rating

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

(3)
Average based on 3 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 driven 385300
08.01.2019 from Jiri
The tyres are very comfortable thanks to their very soft side walls. The noise was very low when new, now slowly raises but still okay. The handling is not very good, but it is a suv, so I don't mind. The wet performance could be better. But: the tire costs half the price of any other tyre for CR-V and doesn't fail in any aspect.
10.11.2018 from Kieran Mulderrig
Confidence
25.09.2018 from Mario Zanetti
Very good tyres,more comfortable than Continental I had before.
(3)

Reifentest.com

just  181.11 £
available
Details
Yokohama Advan Sport (V107) SUV
Yokohama
Yokohama
Advan Sport (V107) SUV
255/40 ZR21 102(Y) XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip A Noise emissions 73 dB
just  223.84 £
limited stock
Details
Hankook Ventus evo K137A
Hankook
Hankook
Ventus evo K137A
255/40 ZR21 102Y XL 4PR, SUV SBL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance B Wet grip A Noise emissions 71 dB
just  229.45 £
available
Details
Hankook Ventus S1 Evo Z K129
Hankook
Hankook
Ventus S1 Evo Z K129
255/40 ZR21 102(Y) XL 4PR * SBL

Tyre type

Supersport Road

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip A Noise emissions 72 dB
just  237.88 £
limited stock
Details
New
Vredestein Ultrac Pro
Vredestein
Vredestein
Ultrac Pro
255/40 ZR21 102(Y) XL, EVc

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip A Noise emissions 72 dB
just  242.23 £
available
Details
Hankook Ventus S1 Evo 3 K127A
Hankook
Hankook
Ventus S1 Evo 3 K127A
255/40 ZR21 102Y XL 4PR, SUV SBL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip A Noise emissions 73 dB
Client reviews rating:
Client reviews rating

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

(1)
Average based on 1 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 driven 171536
03.09.2025 from Russ
The Tyres give good grip and little noise. They grip Well in the dry and seem ok in wet
(1)

Reifentest.com

just  267.00 £
available
Details
New
Hankook iON evo (IK01A)
Hankook
Hankook
iON evo (IK01A)
255/40 ZR21 102(Y) XL 4PR SoundAbsorber, EV, SUV SBL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance A Wet grip A Noise emissions 68 dB
just  279.02 £
limited stock
Details
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Prices include VAT and delivery within mainland UK (excl. Scottish Highlands).

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