Well done. Welcome to the speed rating. This tells you the maximum speed the tyres can handle. Of course, it would be too obvious to put the actual max speed on the tyre. Instead, you get a letter and need to consult another chart. You are limited to the speed limit of the roads you travel on. And you can only go as fast as the lowest rated tyre you have on the vehicle your tyres may not all be the same. Check out a full chart of speed ratings here.
Yup, you got it. It would be a pretty sweet tyre too as you can get a Continental UltraContact 6 in this size. Hold the horses we here you say Indeed, your numbers look more like 31x Fear not.
This represents the letter in the image. The next two digits after the letter are the size of the wheel rim that the tyre can be fitted onto. This also represents the diameter of the tyre from bead to bead.
Therefore, the above tyre with the number 18, will fit on an inch wheel rim. The load index of your tyre relates to the maximum amount of weight it can carry. For example in the tyre above, it has a load index of kg.
The speed rating is the letter that can be found after the load index number and represents the maximum speed of a tyre when correctly inflated and being used under load. The first two digits represent the week of the year the tyre was produced from 1 to The last two digits represent the year.
So a tyre marked was manufactured in the 13th week of Tyres age over time, which can be accelerated if the vehicle is used infrequently. If the date of manufacture on your tyres is in excess of 6 years, we recommend having your tyres checked out to ensure they are still roadworthy.
Tyres with an increased load index are often marked to show that they have been reinforced in order to handle extra weight. 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. Further information. Some tyres are intended specifically for use with certain vehicle makes for added performance benefits. When buying new tyres, you will need to make a note of the following tyre size information from the sidewall of the existing tyre to ensure you select the correct replacement tyre for the vehicle.
This is the width of the tyre in millimetres. The rim size is the rim diameter of the tyre. It is a two digit number that can be found just after the letter R on the sidewall. The speed rating is represented as a letter of the alphabet and can be found to the right of the load index - It is usually the last character shown in the tyre size string. Back To Tyres. Unsure where to find your tyre size?
Click here for more information. 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.
Please note: Centres do not open until on bank holidays. If choosing an appointment on a bank holiday please bring your vehicle to centre at rather than the as shown. Tyres receive a speed rating based on a series of tests which measure the tyres capability to handle a set speed for a prolonged period of time.
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