At some point on a tyre sidewall, usually on a lower edge, there will be a number comprising four digits. The first two numbers state the week of the year in which the tyre was made and the second two give the year. So ‘3620’ means the 36 th week of the year 2020. The age of a tyre matters, even if it is new. The easiest way to find your tyre size is by simply looking on the sidewall of the tyre. Tyre manufacturers always feature the tyre size on the sidewall of the tyre. Some premium vehicles such as Mercedes however, have different size tyres on the front and back, so you need to ensure that you get the correct tyre size of the specific tyre that Tyre sizes are made up of a number of different numbers and letters. For example tyre size 185/60 R 14 82 H is made up of the following information: 185. The tyre section width in millimetres. 60. The aspect ratio in % (the height of the sidewall divided by the tyre's width) R. Denotes the tyre's construction type - in this case it's a radial. 225/75R15 tires have a diameter of 28.3", a section width of 8.9", and a wheel diameter of 15". The circumference is 88.8" and they have 713 revolutions per mile. Generally they are approved to be mounted on 6-7.5" wide wheels for passenger tires and 6-7" for LT tires. Specs may vary by manufacturer. learn more. Quick Facts About Numbers on Tires. Numbers on a tire include more than dimensions. The markings indicate maximum speed, load limits, and more. Manufacturers strongly recommend you use tires Tire Size. The biggest set of numbers on your tire sidewall make up your tire size. Using tire size P205/65R15 from the image above as an example, let's learn how to read your tire size. P - The letter at the beginning of the tire size is the tire type. Depending on the type of vehicle you drive, you will need a tire that accommodates it’s needs. How To Read ATV Tire Sizes. ATV tire sizes are displayed on the tire’s sidewall, and you’ll generally find them in either of two sizing formats: Imperial (measured in inches): Examples include 27X10R12 or 27X10-12. Metric (measured in millimeters and inches): Examples include 215/80R14 or 215/80-14. Out of the two, the imperial format in In today’s Tread Life episode, we will teach you how to read tire size. Having the proper tire size is so important. Not only can having the wrong tires affe Check the ISO sizing, if available. If you read your bike tire sidewall, there’s a combination of numbers that have 5 digits in total – 2 at the front and 3 at the end, separated by a dash in between. That’s the ISO sizing, which stands for International Standardization Organization – a more accurate way to measure your bike. hfcL6n.

how to read tyre dimensions