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Home  >  255 / 40 18  >  Uniroyal  >  Uniroyal 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:
 
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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.
 

Our offer for  Uniroyal   255/40  18     

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Prices include VAT and delivery within Ireland

Uniroyal RainSport 5
Uniroyal
Uniroyal
RainSport 5
255/40 R18 99Y XL, EVc

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
Client reviews rating:
Client reviews rating

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

(23)
Average based on 23 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 driven4080408
10.12.2025fromStephen Brown
Great tyres, safe and give confidence on all surfaces and conditions
13.06.2025fromstevi
best tyres ever had them on Audi A3 TDI sport ,fiesta st .ford focus MK2,jaguar xj 3Ltdi best grip ever handles in wet like a great tyre does when dry grips so hard in the dry the engine struggles to go faster because of the grip tried all the named brands like Mitchellen ,toyos ,co rentals and the uni royals beat them ever time not just price but grip safety and handling too .never use any other tyre the 5s are better than the 3s but not by much . hard to improve on such a great tyre
02.11.2024fromA Pritchard
Great.
13.04.2024fromGeof Wassell
Driving within my own ability and the ability of the vehicle I choose to drive is what I do. The tyres on my car are part of the interface between driver and road. I prefer to drive with the tyres fully inflated in order to feel the feedback from the surface of the road through noise, suspension and steering, I ballance throttle and brake response with weather conditions, road conditions and temperature. Tyres with less grip just dictate that I should moderate speed and braking at an increased rate. Noisey tyres provide slightly better feedback than silent tyres. The road with current traffic congestion burden isnt the place for performance spirited driving but is the place where defensive driving must be used. I would describe my tyres as competent.
(23)

Reifentest.com

just  132.55 £
available
Details
Show all the tyres in the selected size
Three-A Ecowinged
Three-A
Ecowinged
255/40 R18 95Y

Tyre type

 Summer tyres
available
just  56.52 £
available
Details
Kustone Passion P9
Kustone
Passion P9
255/40 R18 99W XL

Tyre type

 Summer tyres
limited stock
just  56.52 £
limited stock
Details
Accelera Phi
Accelera
Accelera
Phi
255/40 R18 99Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip CNoise emissions 70dB
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
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  60.53 £
available
Details
Pace ALVENTI
Pace
Pace
ALVENTI
255/40 R18 99W XL

Tyre type

 Summer tyres
available
just  61.09 £
available
Details
Nordexx NS9200
Nordexx
NS9200
255/40 R18 99Y XL

Tyre type

 Summer tyres
available
just  67.63 £
available
Details
Fronway Eurus 08
Fronway
Eurus 08
255/40 R18 99W XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 71dB
just  68.58 £
available
Details
Profil Pro Snow 790
Profil
Pro Snow 790
255/40 R18 99V XL runderneuert

Tyre type

 Winter tyres
available
just  68.90 £
available
Details
Tomket Sport
Tomket
Sport
255/40 R18 99Y XL

Tyre type

 Summer tyres
available
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com 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's which are a Chinese made model. Have been generally happy with these as been on some long & many short trips in last year. They have given confidence inspiring performance through all weathers & 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  72.19 £
available
Details
AUSTONE SP901
AUSTONE
SP901
255/40 R18 99H XL

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip CNoise emissions 73dB
just  78.72 £
available
Details
Lanvigator Wintergrip UHP
Lanvigator
Wintergrip UHP
255/40 R18 99V XL

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 73dB
just  79.84 £
limited stock
Details
Arivo Winmaster ARW 3
Arivo
Winmaster ARW 3
255/40 R18 99H XL

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip DNoise emissions 70dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com 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  79.87 £
available
Details
Westlake Z-507
Westlake
Westlake
Z-507
255/40 R18 99V XL

Tyre type

 Winter tyres
available
just  80.05 £
available
Details
Arivo Ultra ARZ-5
Arivo
Ultra ARZ-5
255/40 R18 99W XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet 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.

(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  80.54 £
available
Details
Tracmax X-Privilo S330
Tracmax
X-Privilo S330
255/40 R18 99V XL

Tyre type

 Winter tyres
available
just  80.71 £
available
Details
Radar Dimax Winter
Radar
Radar
Dimax Winter
255/40 R18 99V XL

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip BNoise emissions 73dB
just  81.84 £
available
Details
Westlake SA37 Sport
Westlake
Westlake
SA37 Sport
255/40 R18 99Y XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 73dB
just  81.96 £
limited stock
Details
Tourador Winter Pro TSU2
Tourador
Winter Pro TSU2
255/40 R18 99V RF

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip CNoise emissions 70dB
just  84.07 £
limited stock
Details
Westlake ZuperAce Z-007
Westlake
Westlake
ZuperAce Z-007
255/40 R18 99Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
just  84.48 £
available
Details
Trazano Z507
Trazano
Trazano
Z507
255/40 R18 99V

Tyre type

 Winter tyres
available
just  84.48 £
available
Details
APlus A702
APlus
A702
255/40 R18 99V XL

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 73dB
just  84.65 £
limited stock
Details
Royal Black Winter UHP
Royal Black
Winter UHP
255/40 R18 99V XL

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 73dB
just  84.70 £
limited stock
Details
Westlake ZuperAce Z-007
Westlake
Westlake
ZuperAce Z-007
255/40 R18 99W XL, run-flat

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip BNoise emissions 73dB
just  87.52 £
available
Details
Profil PS790 AS
Profil
PS790 AS
255/40 R18 99V XL runderneuert

Tyre type

 All-season tyres
limited stock
just  89.65 £
limited stock
Details
Triangle Effexsport TH202
Triangle
Triangle
Effexsport TH202
255/40 R18 99Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
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  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven241812
26.02.2025fromPhillip Claridge
The car was supplied to me with brand new Triangle tyres - a brand I had not heard of and was not one I would have gone for but in the year that I have had them on the car, I have no complaint about their performance. I cannot say whether they would be the tyre of choice when replacement is necessary. t
(1)

Reifentest.com

just  91.28 £
available
Details
CEAT SportDrive
CEAT
CEAT
SportDrive
255/40 R18 99Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 71dB
just  91.79 £
available
Details
Landsail RapidDragon
Landsail
Landsail
RapidDragon
255/40 R18 99W XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip BNoise emissions 73dB
just  91.85 £
available
Details
Sailun Ice Blazer Alpine Evo1
Sailun
Sailun
Ice Blazer Alpine Evo1
255/40 R18 99V XL

Tyre type

 Winter 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.

(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 driven52500
16.10.2024fromJurijs
One of the best winter tyres I had from year 2007, when I started to drive my own car. Confident driving also with one side on ice, another on dry surface, on wet snow or just wet surface.
(1)

Reifentest.com

just  94.62 £
limited stock
Details
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Prices include VAT and delivery within mainland UK (excl. Scottish Highlands).

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