3.16.4.4. Second test speed: speed corresponding to the speed symbol less 10 km/h; 3.16.4.4.1. Duration of the second step = 10 min. 3.16.4.5. Final test speed: speed corresponding to the speed symbol: 3.16.4.5.1. Duration of the final step = 30 min. 3.16.4.6. Total test duration: 1 h. 3.16.4.7. Endurance test programme Load index Tyre speed category symbol speed Load placed on the wheel as a percentage of the load corresponding to the load index Radial-ply1 km.h-1 7 h. 16 h. 24 h. 122 or more F G J K L M 32 40 48 56 64 72 66 % 84 % 101 % 121 or less F G J K 32 40 48 56 L M N P 64 80 88 96 70 % 4 h. 75 % 75 % 75 % 88 % 6 h. 97 % 97 % 97 % 106 % 114 % 114 % 114 % Special use tyres (marked "ET" or "ML" or "MPT") should be tested at a speed equal to 85 per cent of the speed prescribed for equivalent normal tyres.
Annex 6 Tyre-size designations and dimensions Table A Code designated sizes mounted on 5° tapered rims or flat base rims Tyre size designation Measuring rim width Code Nominal rim diameter d (mm) Outer diameter D (mm) Section width S (mm) Std. series Radial Radial 4.00R10(*) 4.00R12(*) 4.50R10(*) 4.50R12(*) 5.00R10(*) 5.00R12(*) 6.00R9 6.00R14C 6.00R16(*) 6.50R10 6.50R14C 6.50R16(*) 6.50R20(*) 7.00R12 7.00R14C 7.00R15(*) 7.00R16C 7.00R16 7.00R20 7.50R10 7.50R14C 7.50R15(*) 7.50R16(*) 7.50R17(*) 8.25R15 8.25R16 9.00R15 9.00R16(*) 3.00 3.00 3.50 3.50 3.50 3.50 4.00 4.50 4.50 5.00 5.00 4.50 5.00 5.00 5.00 5.00 5.50 5.50 5.50 5.50 5.50 6.00 6.00 6.00 6.50 6.50 6.00 6.50 254 305 254 305 254 305 229 356 406 254 356 406 508 305 356 381 406 406 508 254 356 381 406 432 381 406 381 406 466 517 490 545 516 568 540 626 728 588 640 742 860 672 650 746 778 784 892 645 686 772 802 852 836 860 840 912 108 108 125 125 134 134 160 158 170 177 170 176 181 192 180 197 198 198 198 207 195 212 210 210 230 230 249 246 (*) The tyre size designation may be supplemented with the letter "C".
Table B Tyres for light commercial vehicles Tyre size designation Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) Section width S (mm) Metric designated 145 R 10 C 145 R 12 C 145 R 13 C 145 R 14 C 145 R 15 C 155 R 12 C 155 R 13 C 155 R 14 C 165 R 13 C 165 R 14 C 165 R 15 C 175 R 13 C 175 R 14 C 175 R 16 C 185 R 13 C 185 R 14 C 185 R 15 C 185 R 16 C 195 R 14 C 195 R 15 C 195 R 16 C 205 R 14 C 205 R 15 C 205 R 16 C 215 R 14 C 215 R 15 C 215 R 16 C 245 R 16 C 17 R 15 C 17 R 380 C 17 R 400 C 19 R 400 C 4.00 4.00 4.00 4.00 4.00 4.50 4.50 4.50 4.50 4.50 4.50 5.00 5.00 5.00 5.50 5.50 5.50 5.50 5.50 5.50 5.50 6.00 6.00 6.00 6.00 6.00 6.00 7.00 5.00 5.00 150 mm 150 mm 254 305 330 356 381 305 330 356 330 356 381 330 356 406 330 356 381 406 356 381 406 356 381 406 356 381 406 406 381 381 400 400 492 542 566 590 616 550 578 604 596 622 646 608 634 684 624 650 674 700 666 690 716 686 710 736 700 724 750 798 678 678 698 728 147 147 147 147 147 157 157 157 167 167 167 178 178 178 188 188 188 188 198 198 198 208 208 208 218 218 218 248 178 178 186 200 Code designated 5.60 R 12 C 6.40 R 13 C 6.70 R 13 C 6.70 R 14 C 6.70 R 15 C 4.00 5.00 5.00 5.00 5.00 305 330 330 356 381 570 648 660 688 712 150 172 180 180 180
Table C Tyres for special applications Tyre size designation Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) Section width S (mm) Code designated 21x8R9 21x4 22x4 1/2 23x5 23x9R10 25x6 27x10R12 28x9R15 6.00 2.32 3.11 3.75 6.50 3.75 8.00 7.00 229 330 330 330 254 330 305 381 535 565 595 635 595 680 690 707 200 113 132 155 225 170 255 216 Metric designated 200R15 250R15 300R15 6.50 7.50 8.00 381 381 381 730 735 840 205 250 300 Table D Tyres with LT designation Tolerances shown at the bottom of the tables apply in place of those shown in paragraphs . and . Outer diameters are listed for the various categories of use: Normal, Snow, and Special. Tyre size designation Measuring rim width code Nominal rim diameter d(mm) Outer diameter D (mm) Normal Snow Section width S (mm) 6.00R16LT 4.50 406 732 743 173 6.50R16LT 4.50 406 755 767 182 6.70R16LT 5.00 406 722 733 191 7.00R13LT 5.00 330 647 658 187 7.00R14LT 5.00 356 670 681 187 7.00R15LT 5.50 381 752 763 202 7.00R16LT 5.50 406 778 788 202 7.10R15LT 5.00 381 738 749 199 7.50R15LT 6.00 381 782 794 220 7.50R16LT 6.00 406 808 819 220 8.25R16LT 6.50 406 859 869 241