So what are pneumatic marks exactly? The rubber of the pneumatic is marked for two major reasons; crucial data such as size and specifications of the wheel can be conveyed and, secondly, the necessary safety requirements must be demonstrated.
These data are given as pneumatic signs and symbols – which can be confusing if you’re not aware of your needs! Look at this useful introduction to pneumatic marks and discover what your Falken tyres sleaford says.
- Size of Tyre
In image 255/55 R16 this string of numbers shows the pneumatic size. This is important because you will have to make sure any tyre, as specified in your vehicle’s manual, are the correct size. The numbers of these tyres:
- 255 – Tyre Width
This shows the tyre width from sidewall to sidewall by millimetres.
- 55 – Aspect Ratio
These numbers show the height and the width as a percentage of the width of the pneumatic sidewall. The height of the pneumatic pipeline is 55% in this example.
- R – Tyre Building
The letter ‘R’ shows the pneumatic construction, as most wheels are today. ‘B’ (bias belt) and ‘D’ are other construction types (diagonal).
- 16 – Wheel Diameter
This figure shows the size of the wheel rim in centimetres to which the tyre should be fitted.
More Symbols Of Tyres
In the picture represented by 105, the load index is a numeric code that indicates the maximum load a tyre can be carrying. As indicated in the table below, the load index is directly related to a kilogram weight. The tyre load index in this example is 105 so that it can carry a maximum load of 925kg.
Rating Of Speed
A letter in the example ‘V’ shows the speed rating and indicates how fast the tyre can operate if the maximum loads are carried. The speed rating letter is for speed, as shown in the following table, which is shown in miles or kilometres per hour. The speed of the tyre is ‘V’, which is 240 km/h at the maximum speed in this example.
1. Name Of Fire
The brand that produced the tyre is clearly shown. Often this is the biggest typeface on the tyre.
2. Name of Pattern
Manufacturers of tyres produce various types of tyres. Your pneumatic design will appear on the sidewall of the pneumatic.
3. Manufacturing Country
The inscription on the sidewall indicates where your tyre was fabricated. The tyre was produced in the United Kingdom, in this example.
4. Tread Indicators of Wear
The indicators of tread wear will not be placed on the sidewall in the groovings of the pipe. The letters ‘TWI,’ a small picture or logo, or other markings may be in the form of them. These are visible only if the pneumatic pad is close to the legal minimum of 1.6 mm. Not all tyres have indicators of tread wear, so you must check your tread depth frequently.
5. Date Code of Fabrication
The information on when your tyre has been fabricated is displayed as a string of numbers and letters that look like DOTXXXXXXX1017. The last four numbers concern the date of production so that the age of your pneumatic can be identified.
The date code for this example is 1017, which would indicate that the piping was produced in the 10th week of 2017.
6. Type Approval Of The European Ece
This shows that the pneumatic tyre has been tested and European safety standards have been met. The figure after E is a code for the country where the tyre has been approved. In this example, E11 means the pneumatic tyre in the UK has been approved.
Contact your car tyres sleaford specialists for further advice and guidance on pneumatic markings and what these mean.