The Tyre Code

Each motor tyre was definitely gotten by the code, this code gave the meaning would all information to know the measurement, the strength, the speed and the age from this tyre.
There were two normal sorts of the tyre code was used that is the Imperial code and Metric. To the motorcycle tyre was gotten by the code that took the form of the figure or the letter for example 4.60-H-18 4PR or 130/90-16 67H. What information that could we could from this code?

The example of the Imperial code

1. 4.60-H-18 4PR 4,60 said wide the tyre (in the unit inchi)
2. H showed the speed limit
3. 18 showed the diameter of the rim/rim (in the unit inchi)
4. 4PR showed the strength of the tyre that was based on the strength of fibre of tyre cloth/ply rating 4PR significant the use of the layer of cloth from the nylon material inside carcass show indications the strength was equal to 4 layers of tyre cloth. For the Imperial code, aspect the ratio (the high comparison the tyre against wide the tyre) was based on the value 100 % (high the tyre be the same as wide the tyre).
   

The example of the code of Metric 130/90-16 67H

1. 130 showed wide the tyre (in the unit mili metre)
2. 90 showed the high comparison the tyre towards the width. 90 meant the high comparison the tyre 90 % from the width. If wide 130 mm, then high the tyre 90 % x 130 mm = 117 mm. Aspect the small ratio will increase the stability and handling the vehicle.
3. 16 showed the diameter of the rim/rim (in the unit inchi)
4. 67 showed the burden maximum that was permitted (load the index/LI). LI 67 meant the burden of the maximum that could be borne as big as 307 kg.
5. H showed the use speed limit (same like in the example above)
   

Note:

• Q for the maximal speed 160 km/h
• S for the maximal speed 180 km/h
• T for the maximal speed 190 km/h
• U for the maximal speed 200 km/h
• H for the maximal speed 210 km/h
• V for the maximal speed 240 km/h
• W for the maximal speed 270 km/h
• Y for the maximal speed 300 km/h
• Z for the speed above 240 km/h

Moreover, was pointed also out by the code of four figures that were received beside the tyre. For example, 2201. This figure implied the period of the production of the tyre. Two first figures show the week, two last figures were significant the production year. So if being read, the code above was significant, the tyre was produced in the 22nd week in 2001. This figure code was important, considering how long the tyre was kept, susceptible to damage resulting from the tyre compound hardening. So when we will buy the tyre with the different make paid attention to his code, and checked whether being the same his specification with the tyre that beforehand was used by us.