Document ID: chunk:federal_register_of_legislation:F2018L01518:reg:4:p3
Version: federal_register_of_legislation:F2018L01518
Segment Type: reg
Provision Reference: reg 4 (pt 3/4)
Character Range: 65558–68484

the load capacity index of the tyre.

3.6.  At the start of the test, measure the deflected section height (Z1).

3.7.  During the test the temperature of the test room must be maintained at 38°C ± 3°C.

3.8. Carry the test through, without interruption in conformity with the following particulars:

3.8.1. time taken to pass from zero speed to constant test speed: 5 minutes

3.8.2. test speed: 80 km/h

3.8.3. duration of test at the test speed:  60 minutes

3.9. At the end of the test, measure the deflected section height (Z2).

3.9.1. Calculate the change in per cent of the deflected section height compared to the deflected section height at the start of the test as ((Z1 – Z2) / Z1) x 100.

4. Equivalent test methods

If a method other than that described in paragraphs 2. and/or 3. above is used, its equivalence must be demonstrated.

[*] *Former titles of the Agreement:
 Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment and Parts, done at Geneva on 20 March 1958 (original version);
 Agreement concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles, Equipment and Parts which can be Fitted and/or be Used on Wheeled Vehicles and the Conditions for Reciprocal Recognition of Approvals Granted on the Basis of these Prescriptions, done at Geneva on 5 October 1995 (Revision 2).

[*] For the purpose of this regulation "tyres" means "pneumatic tyres".
[1] As defined in Annex 7 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).
[2]/ See explanatory figure.
[3]/ Before 1 January 2000, the date of manufacture may be indicated by a group of three digits, the first two showing the week and the last one the year of manufacture.
[4]/ The distinguishing numbers of the Contracting Parties to the 1958 Agreement are reproduced in Annex 3 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), document ECE/TRANS/WP.29/78/Rev.6 - www.unece.org/trans/main/wp29/wp29wgs/wp29gen/wp29resolutions.html.
[5] When the conventional number is given by codes, the value in mm is obtained by multiplying such number by 25.4.
[6] Distinguishing number of the country which has granted/extended/refused/withdrawn approval (see approval provisions in the Regulation).
[7] Strike out what does not apply.
[8]  A list of brand name(s)/trademark(s) or Trade description(s)/ Commercial name(s) may be annexed to this communication
[1/] Tolerance:  see paragraphs 6.1.4. and 6.1.5.
[2/] The  following  size  designations are accepted:  185-14/7.35-14  or  185-14  or  7.35-14      or  7.35-14/185-14.
[1/] Tolerance:  see paragraphs 6.1.4. and 6.1.5.
[1/] The value of "3.2" in respect of Speed Category "Y" tyres was inadvertently omitted from Supplement 5 to the 02 series of amendments which entered into force on