Pctts 266 : 20xx general statement

1 Scope

This standard does not apply to retreaded or regrooved tyres, or to used tyres (casings) intended for the retreading or regrooving process.

2. Normative references

TTS 76-1 Requirements for labelling - General principles of labelling.

TTS 429 Definitions of terms used in the pneumatic tyre industry.

TTS 432 Code of practice for the storage of tyres, inner tubes and flaps.

2. Terms and definitions

2. Tyre designation

1. Dimensional and constructional characteristics

This order shall be maintained.

2. Nominal section width

3. Nominal aspect ratio

NOTE 1 The aspect ratio is one hundred times the ratio of the section height to the section width of the tyre.

NOTE 2 When the nominal aspect ratio is 82 for radial ply tyres, or 95 and 88 for diagonal ply tyres, these numbers may be omitted.

4. Tyre construction code

• 
  B for bias-belted construction;
  
• 
  D for diagonal construction; and
  
• 
  R for radial ply construction.
  

5. Nominal rim diameter code

NOTE New concept rims are rims that are substantially different in design to conventional rims.

6. Service conditions characteristics

• 
  load index;
  
• 
  speed symbol; and
  
• 
  maximum permissible inflation pressure.
  

NOTE Information regarding the relationship between load index and the maximum permissible inflation pressure may be obtained from the manufacturer or publications of organizations listed in annex A.

7. Other service characteristics

NOTE Specific indications, as required, may be added to indicate:

1. 
   the type of vehicle for which the tyre is primarily designed by using a symbol “P”, which is the symbol for passenger car tyres;
   
2. 
   the temporary use of certain spare tyres using indications such as “TEMPORARY USE ONLY”;
   
3. 
   the position of mounting;
   
4. 
   the direction of rotation; and
   
5. 
   the type of tread pattern.
   

4. Requirements for new tyres

   1. General

The listing shall be contained in publications, current at the date of manufacture of the tyre or any later date, of at least one of the organizations listed in annex A.

Each rim listing shall include dimensional specifications and a diagram of the rim.

5.1.2 Each tyre shall incorporate a tread wear indicator that will provide a visual indication when the tyre has worn to a minimum acceptable tread depth as recommended by the manufacturer.

2. Physical dimensions

1. 
   7 %, for tyres with a maximum permissible inflation pressure of 32 psi, 36 psi or 40 psi; or
   
2. 
   7 % or 10.2 mm (0.4 in), whichever is the larger, for tyres with a maximum permissible inflation pressure of 60 psi, or 240 kPa, 280 kPa, 300 kPa or 340 kPa.
   

3. 
   
   Directory: barreirastecnicas -> pontofocal
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   pontofocal -> Draft regulation Impact Statement for Underrun Protection a draft statement inviting discussion and comments from parties affected by the proposed heavy commercial vehicle safety initiative January 2007 Report Documentation Page
   pontofocal -> Kenya standard ks 06-77: 1978 ics 13. 340
   
   
   
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