Tyre/Tire Markings! What do they mean?
This side of the tyre should not be visible from outside the vehicle. LT - Light Truck, indication that the tyre is designed for 4x4 vehicles and light trucks used in the US.
HOW TO READ YOUR TYRE SIDEWALL
It is placed under the size of the tyre. It is also present on tyres supplied from outside Europe. This marking is only a manufacturer's declaration, it is not an official symbol confirming the properties of winter tyres. Its aim is to protect the edge of the rim from mechanical damage which may be caused by driving onto a curb or by colliding with small objects.
There are different names used for this protector depending on the tyre manufacturer. Apart from MFS, the most common names include:. Outside means that the sidewall with this marking must be visible from the outside of the car after installing it. P - Passenger, symbol placed in front of the tyre size marking. It indicates that the tyre is designed for passenger vehicles used in the US. RF - Reinforced; indicates a reinforced tyre with a higher load capacity.
It has a similar meaning as for tyres with an XL symbol. This kind of protection prevents damage to the rim caused by impacts or abrasions, e. ROF - Run On Flat, marking used by Goodyear and Dunlop to indicate tyres that may continue operation after damage and loss of internal pressure. Reinforced tyres have a special design that allows them to be used with a higher load.
TWI is present at six locations on the tyre circumference as a raised rubber strip inside tread grooves , and it indicates the limit of allowable tread wear.
How to read your tyre’s sidewall markings
When the tread is worn to the level of TWI, it means that the tyre reached legally required minimum depth of 1. At this stage, you should consider replacing the tyre. VR or ZR - Speed indexes included in the tyre marking. VR and ZR indicate that the tyre may be operated at full load up to the specified speed limits:. From 1 st November , each tyre produced after 30 th June must be provided with a label that provides information about its basic performance. It includes 3 parameters:. Rolling resistance, affecting fuel consumption and CO 2 emissions to the atmosphere. The labels give you an overall view of the performance of the tyre, but they do not present many important parameters, e.
When buying the tyres, do not rely only on their labels. This also means that the tyre is designed for the winter season.
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It is slightly more difficult to distinguish between a winter tyre from an all-season model. The differences are visible on the tread. All-season tyres have lower number of cuts and grooves than a typical winter tyre, but more than a summer tyre. Some models have an asymmetric tread pattern, where half of the tread is responsible for tyre properties in the summer summer tread with lower number of sipes and the second half for winter performance.
The names of all-season models often include phrases suggesting good performance throughout the year, such as "All Season", "Quatrac", "Quadraxer", "4Seasons", "All Weather", etc. Some manufacturers also have their own individual markings for all-season tyres. Usually, it includes symbols allowing users to easily recognise the tyre type. In European conditions, all-season tyres have similar performance to winter tyres and they have a symbol of a mountain top with a snowflake.
To sum up, the symbol of a mountain top with a snowflake means that the tyre will perform well in typical winter conditions. Officially, they are not applicable in Europe, so manufacturers and retailers do not provide information about their meaning and values for individual models. To explain this approach, we must first introduce the concept of the reference tyre.
How is the index assigned? A test is carried out under controlled conditions on a route with a distance of 6, miles, approx. The tested tyre is mounted onto a special vehicle with tyres having a index. Then the tyre wear is measured. The measurement is carried out every miles km , and the tyres are accordingly re-installed rotational. Based on the measurement results, the tyres are marked with indexes, e. As a result, a tyre with an index of 60 will wear almost two times faster than a tyre with an index of In turn, a tyre with index will wear down two times slower than the reference tyre, but two times faster than the tyres with index A model with index will be four times more durable than the reference product index Traction in UTQG markings is expressed with letters.
AA is the highest rating, followed by A and B, whereas C is the lowest value. This marking informs the driver about the ability of stopping the car on wet surfaces. During the test the ABS system in the vehicle is turned off. If you prefer a dynamic and aggressive driving style, try to find tyres marked with AA index. When driving at high speeds, the tyre strongly heats up, which may shorten its operational life.
Tyre Marking Explained | Ulster Tyres
In order to assign the index A, B or C, where A is the best value a laboratory assessment is performed. It includes a series of tests. Resistance to overheating is strongly related to speed. If you want to base your choice on these markings, remember that the difference between a tyre with an index of and will be significant. This varies from one manufacturer to the next but look out for the following symbols which are used to identify if the tyre has been reinforced. Run flat tyres are specially designed with strengthened side walls so that, in the event of a loss of pressure such as a puncture, the tyre can hold the weight of the vehicle and continue to be used for a short time until you can reach an appropriate place to stop and have the tyre replaced.
There are many different tyre markings for run flat tyres depending on the manufacturer. Some tyres are intended specifically for use with certain vehicle makes for added performance benefits. We are committed to offering customers our most competitive tyre prices. Read about our exclusive online tyre pricing. Kwik Fit has over centres across the UK including Northern Ireland, many of which are open 7 days a week for your convenience.
We endeavour to ensure we are displaying the correct tyres for your vehicle. However, we recommend all customers check the tyre size printed on the side wall of their tyres before proceeding with a tyre purchase as occasionally discrepancies do occur. By selecting the tyre sizes above and clicking 'Continue', you are indicating that you have checked your tyre sizes. Sorry but we could not find your vehicle. Please enter your vehicle details below. Cookies and your privacy Our website uses cookies to place bookings and help us provide a better service.
Servicing Information When is my car service due? Why service your car? What's included in my service? Servicing for your vehicle ServiceCare. Van Service Van Service. Tyre Markings The writing on your tyres can be confusing. Tyre Size Your tyre size can be found on the sidewall of your current tyre and is a sequence of numbers and letters. Tyre width The first three digits.
Aspect ratio The fourth and fifth digits of the tyre code that immediately follow the tyre width. Radial Radial tyres are marked with the letter R. Wheel diameter The next two digits represent the size of the wheel rim that the tyre can be fitted to.
Speed Rating The speed rating of a tyre is represented by a letter of the alphabet at the end of the tyre size code and indicates the maximum speed capability of the tyre. Select your tyre speed rating to find out the maximum speed your tyres can maintain. Load Index The load index provides information on the maximum weight capability for the tyre.
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Select your load index to find out the maximum load capability for your tyres. Date of Manufacture Your tyre is also printed with information about when and where the tyre was manufactured. Reinforced Tyres with an increased load index are often marked to show that they have been reinforced to handle extra weight.
How To Read A Tire Sidewall
Run Flat Run flat tyres are specially designed with strengthened side walls so that, in the event of a loss of pressure such as a puncture, the tyre can hold the weight of the vehicle and continue to be used for a short time until you can reach an appropriate place to stop and have the tyre replaced. Homologation Some tyres are intended specifically for use with certain vehicle makes for added performance benefits. Tyre Search By Size Unsure where to find your tyre size?
Exclusive Online Tyre Pricing We are committed to offering customers our most competitive tyre prices. Customer Services 75 76 77 Our Customer Service opening hours are 8: Please select your front and rear tyre size before clicking 'Continue'. Please select your front tyre size and rear tyre size below before clicking 'Continue'. To continue with your booking, please select your appointment time from the list below. Select Your Appointment Time Please select.
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