All drivers should know where and how to find the size of tyres fitted on their vehicle. It is quite easy to find this information out, but you do need to know where to look. On the side of every tyre is printed the size it is normally written like 195/55/ R15 87V. If we break this down we can see that it tells us a lot of information about the tyre. The first number in this example is the tyre width in mm, the second is the type height as a percentage of the width and the third letter and number is the diameter. The next number (87) is the load capacity and the final letter is the speed rating. All of this information tells you what you need to know to select the right tyre for your vehicle. There is not necessarily only one tyre size that will fit your car and some cars have different sized tyres on the front to those on the back.
If you are looking to buy a new tyre it is important to check the size of the tyre in which you want to replace in case it is different. You should also check to see that the tyre on the other side of the axle also matches that, if not you may need to get both tyres replaced or ensure the new one matches the one on the other side.