Document ID: chunk:federal_register_of_legislation:F2006L01788:front:0:p7
Version: federal_register_of_legislation:F2006L01788
Segment Type: other
Provision Reference: 
Character Range: 20039–23863

of the tyre to be tested (or an 'Approved' equivalent test wheel) with a load not less than the percentage of the 'Maximum Load Rating' of the tyre,
         'Speed Category' "H" and below  - 80.0%
         'Speed Category'  "V" - 72.8%
         'Speed Category'  "W", "Y" and "Z" - 68.0%
23.3.5.2.2.              During the test the ambient temperature at a distance of not less than 150 mm and not more than one metre from the tyre shall be at least 35oC.  No provision is be made for cooling the tyre during the test.
23.3.5.2.3.              Operate the equipment to bring the 'Test Wheel Speed' from zero up to the initial 'Test Wheel Speed' in a period of at least 10 minutes.
23.3.5.2.4.              Except in the case of tyres with a 'Speed Category' "Z" the initial 'Test Wheel Speed' is equal to the maximum speed shown in Table 1 as corresponding to the tyres 'Speed Category' symbol, less 40 km/h.
23.3.5.2.5.              The initial 'Test Wheel Speed' for tyres of 'Speed Category' "Z" must be at least 200  km/h.
23.3.5.2.6.              Operate the equipment with the 'Test Wheel Speed' not less than the initial 'Test Wheel Speed' for at least 10 minutes, then at not less than the initial 'Test Wheel Speed' plus 10 km/h for at least a further 10 minutes, then at not less than the initial 'Test Wheel Speed' plus 20 km/h for at least a further 10 minutes and finally at not less than the initial 'Test Wheel Speed' plus 30 km/h for at least a further 20 minutes.
23.4.                                ALTERNATIVE STANDARDS
         The technical requirements specified in Annex 7 of ECE R 30/02 (including Supplement 1 to the 02 Series of Amendments) - Tyres are deemed to be equivalent to the technical requirements of clause 23.2.2.2.7 (High Speed Test) of this rule.

TABLE  1 -

MAXIMUM PRESSURE INCREASE - HIGH SPEED TEST

'SPEED CATEGORY'  'Rim' DIAMETER  'MAXIMUM VEHICLE SPEED'  PRESSURE INCREASE

                                  24/00                    Diagonal and       Radial
                                                           Bias-belted
                                  km/h                     kPa                kPa

(-) or unmarked   A               170 (for                 refer below        30
                  L               radial ply
                  L               only)
L                                 120                      NIL                NIL
M                 V               130                      10                 NIL
N                 A               140                      20                 NIL
P                 L               150                      30                 10
Q                 U               160                      40                 20
R                 E               170                      50                 30
S                 S               180                      60                 40
T                                 190                      70                 50
U                                 200                      80                 60
H                                 210                      90                 70
V                                 240                      90                 70
W                                 270                                         90
Y                                 300                                         90
Z                                 Over 240                                    90
(-) or unmarked   10 inch         120                      NIL                -
                  12 inch         135                      15                 -
                  >13 inch        150                       30                -

TABLE 2
LIST OF 'LOAD INDEX' SYMBOLS versus 'Maximum Load Rating'

'LOAD INDEX' SYMBOL  'Max. Load Rating' (kg)