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  2. 255 / 40 18
  3. GT Radial tyres
  4. GT Radial 255 / 40 18
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:
 
/
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.
 

Our offer for  GT Radial  255/40  18   

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GT Radial SportActive
GT Radial
GT Radial
SportActive
255/40 R18 95W

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip CNoise emissions 72dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> 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  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven32000
14.04.2024fromAshley Gain
Tyres had side sway when changing lanes. 1st blowout on 20000 2nd blowout on 30000 and at 40000 last remaining Tyres has wall cracks in inside walls of rear Tyres. Definitely a tyre manufacturer problem. Dealer and supplier is saying I overloaded the tyre and drove on flat tyres. The remaining two tyres are available for evaluation.
(1)

Reifentest.com

just  117.67 £
In Stock
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Free shipping**
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Kpatos FM601
Kpatos
FM601
255/40 R18 99Y XL

Season

 Summer tyres
1 - 2 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
just  55.23 £
limited stock
Details
Free shipping**
Three-A Ecowinged
Three-A
Ecowinged
255/40 R18 95Y

Season

 Summer tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip BNoise emissions 72dB
just  56.94 £
In Stock
Details
Free shipping**
Kustone Passion P9
Kustone
Passion P9
255/40 R18 99W XL

Season

 Summer tyres
1 - 2 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 71dB
just  56.94 £
limited stock
Details
Free shipping**
Nankang Sportnex AS-3
Nankang
Nankang
Sportnex AS-3
255/40 ZR18 99Y XL [EV+], with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip ANoise emissions 73dB
just  59.27 £
In Stock
Details
Free shipping**
Tomket Sport
Tomket
Sport
255/40 R18 99Y XL

Season

 Summer tyres
1 - 2 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(2)
Average based on 2 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 driven196112
21.09.2025fromJohn
I bought these tyres as wanted a budget sport tyre for our recently purchased vauxhall Insignia, so got a pair from Oponeo. They sent Sport 2&#39;s which are a Chinese made model. Have been generally happy with these as been on some long &amp; many short trips in last year. They have given confidence inspiring performance through all weathers &amp; never given me reason to regret buying them. They wear well too as still lots of tread left. Recommended...
23.08.2022fromCallam
Good grip on a dry warm day , Starts excessive oversteer in the wet, and they are almost down to the treadwear indicator in just under 3 k miles . Easily looses traction under acceleration in the wet
(2)

Reifentest.com

just  59.45 £
limited stock
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Tracmax X Privilo TX3
Tracmax
X Privilo TX3
255/40 ZR18 99Y XL

Season

 Summer tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 69dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> 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  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven832761
(1)

Reifentest.com

just  60.99 £
In Stock
Details
Free shipping**
Accelera Phi
Accelera
Accelera
Phi
255/40 R18 99Y XL

Season

 Summer tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip CNoise emissions 70dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> 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
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven1538590
16.01.2019fromPrith
Probably the best in budget tyres
13.05.2014fromRobert
In the corners it slips
14.09.2013fromAdam
good price fast shipping
29.01.2012fromAl
Great tire at the price
(22)

Reifentest.com

just  61.79 £
In Stock
Details
Free shipping**
Invovic EL601
Invovic
EL601
255/40 ZR18 99Y XL

Season

 Summer tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
just  62.06 £
In Stock
Details
Free shipping**
Pace ALVENTI
Pace
Pace
ALVENTI
255/40 R18 99W XL

Season

 Summer tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance BWet grip BNoise emissions 73dB
just  62.45 £
In Stock
Details
Free shipping**
Fronway Eurus 08
Fronway
Eurus 08
255/40 R18 99W XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 71dB
just  69.38 £
In Stock
Details
Free shipping**
Westlake ZuperAce Z-007
Westlake
Westlake
ZuperAce Z-007
255/40 R18 99Y XL

Season

 Summer tyres
1 - 2 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip ANoise emissions 73dB
just  70.50 £
limited stock
Details
Free shipping**
Landspider Sportraxx UHP
Landspider
Sportraxx UHP
255/40 ZR18 99Y XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
just  72.79 £
In Stock
Details
Free shipping**
Radar Dimax R8+
Radar
Radar
Dimax R8+
255/40 ZR18 99Y XL EVc

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
just  73.50 £
In Stock
Details
Free shipping**
Saferich FRC26
Saferich
FRC26
255/40 ZR18 99W XL

Season

 Summer tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip BNoise emissions 72dB
just  74.17 £
In Stock
Details
Free shipping**
Lanvigator Catch Power
Lanvigator
Catch Power
255/40 ZR18 99W XL

Season

 Summer tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip CNoise emissions 73dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> 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 driven112056
08.01.2024fromH
No grip on snow or ice whatsoever. If you have stopped on snow and tried to move all you get is wheel spin and a car that&#39;s sliding everywhere. On 90-degree road bends even at very slow speeds the car slides away from the turn. Talking about stopping power - it is not existent. On level roads, it takes a lot of distance to stop but if you&#39;re going downhill in very slippery conditions had an experience where it took about 100-150m to stop. Can&#39;t even fathom how these tires passed safety regulations. If you value your safety and your car DO NOT BUY!
(1)

Reifentest.com

just  75.21 £
In Stock
Details
Free shipping**
Comforser CF710
Comforser
CF710
255/40 ZR18 99W XL

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance DWet grip BNoise emissions 70dB
just  76.25 £
limited stock
Details
Free shipping**
AUSTONE SP901
AUSTONE
SP901
255/40 R18 99H XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip CNoise emissions 73dB
just  79.13 £
In Stock
Details
Free shipping**
Roadcruza RA 710
Roadcruza
RA 710
255/40 ZR18 99W XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip BNoise emissions 70dB
just  79.41 £
In Stock
Details
Free shipping**
Arivo Winmaster ARW 3
Arivo
Winmaster ARW 3
255/40 R18 99H XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip DNoise emissions 70dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(2)
Average based on 2 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 driven45060
30.11.2023fromPatrick
Tyres are too soft. If you try to turn car feels like with flat tyre. Car wants to go sideways. I am really sad About this tyres and I will not recommend them to anyone who wants to live..
(2)

Reifentest.com

just  79.99 £
In Stock
Details
Free shipping**
Westlake Z-507
Westlake
Westlake
Z-507
255/40 R18 99V XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip CNoise emissions 72dB
just  80.17 £
In Stock
Details
Free shipping**
Arivo Ultra ARZ-5
Arivo
Ultra ARZ-5
255/40 R18 99W XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> 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  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven18000
(1)

Reifentest.com

just  80.66 £
In Stock
Details
Free shipping**
Tracmax X-Privilo S330
Tracmax
X-Privilo S330
255/40 R18 99V XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip CNoise emissions 73dB
just  80.83 £
In Stock
Details
Free shipping**
Lanvigator Wintergrip UHP
Lanvigator
Wintergrip UHP
255/40 R18 99V XL

Season

 Winter tyres
1 - 2 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
just  80.89 £
limited stock
Details
Free shipping**
Radar Dimax Winter
Radar
Radar
Dimax Winter
255/40 R18 99V XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip BNoise emissions 73dB
just  81.96 £
In Stock
Details
Free shipping**
Westlake SA37 Sport
Westlake
Westlake
SA37 Sport
255/40 R18 99Y XL

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
just  82.08 £
limited stock
Details
Free shipping**
Mazzini Cross AS8
Mazzini
Cross AS8
255/40 ZR18 95Y

Season

 All-season tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 71dB
just  82.17 £
In Stock
Details
Free shipping**
Tracmax Trac Saver
Tracmax
Trac Saver
255/40 ZR18 99Y XL

Season

 All-season tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 72dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> 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 driven930780
10.04.2025fromIvan
This is a worst tyre i ever drive! On the wet road is very dangerious!
(1)

Reifentest.com

just  82.22 £
In Stock
Details
Free shipping**
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**Prices include VAT and delivery within mainland UK (excl. Scottish Highlands).

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