Annex 5 to this Regulation or, depending on the tyre design type, the nominal outer diameter expressed in mm; 2.20.1.3. A conventional number "d" (the "d" symbol) denoting the nominal diameter of the rim and corresponding to its diameter expressed either in codes (number below 100) or in millimetres (numbers above 100). Numbers corresponding to both types of measurement may be used together in the designation; 2.20.1.3.1. The values of the "d" symbols expressed in millimetres are shown below: Nominal rim diameter code ("d" symbol) Value of the "d" symbol expressed in mm 8 9 10 11 12 13 14 203 229 254 279 305 330 356 15 16 17 18 19 381 406 432 457 483 20 21 22 24 25 508 533 559 610 635 14.5 16.5 17.5 19.5 20.5 22.5 24.5 26 28 30 368 419 445 495 521 572 622 660 711 762 2.20.1.4. An indication of the tyre to rim fitment configuration when it differs from the standard configuration and is not already expressed by the symbol "d" denoting the nominal rim diameter code; 2.21. "Nominal rim diameter (d)" means the diameter of the rim on which a tyre is designed to be mounted3; 2.22. "Rim" means the support for a tyre-and-tube assembly, or for a tubeless tyre, on which support the tyre beads are seated3; 2.23. "Theoretical rim" means a rim whose width would be equal to x times the nominal section width of a tyre; the value of x shall be specified by the manufacturer of the type;
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 4.50 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 356 381 330 356 406 330 356 381 406 356 381 406 356 381 406 356 381 406 406 381 381 400 400 622 646 608 634 684 624 650 674 700 666 690 716 686 710 736 700 724 750 798 678 678 698 728 - - - - - - - - - - - - - - - - - - 798 - - - - 167 167 178 178 178 188 188 188 188 198 198 198 208 208 208 218 218 218 248 178 178 186 200 - - - - - - - - - - - - - - - - - - 248 - - - - 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 5.00 305 330 330 356 381 570 648 660 688 712 572 640 662 688 714 150 172 180 180 180 148 172 180 180 180 (+) Tyres in diagonal construction are identified by an hyphen in place of the letter 'R' (e.g. C). Table D Tyres for special applications - Radial and diagonal construction Tyre-size designation (+) Measuring rim width code Nominal rim diameter d (mm) Outer diameter D (mm) Section width S (mm) Code Designated 15x4 1/2-8 16x6-8 16.5x6.5-8 18x7 3.25 4.33 5.375 4.33 203 203 203 203 385 425 411 462 122 152 165 173
18x7-8 21x8-9 21x4 22x4 1/2 23x5 23x9-10 25x6 27x10-12 28x9-15 4.33 6.00 2.32 3.11 3.75 6.50 3.75 8.00 7.00 203 229 330 330 330 254 330 305 381 462 535 565 595 635 595 680 690 707 173 200 113 132 155 225 170 255 216 Metric designated 200-15 250-15 300-15 6.50 7.50 8.00 381 381 381 730 735 840 205 250 300 (+) Tyres in radial construction are identified by the letter 'R' in place of the hyphen '-' (e.g. 15x4 1/2 R Part II - United States tyres - Tolerances shown at the bottom of the tables apply in place of those shown in paragraphs 6.1.4.2. and 6.1.5.3. - Outer diameters are listed for the various categories of use: Normal, Snow, Special. Table A Tyres for light commercial vehicles (LT tyres) Diagonal and radial Tyre-size designation1 Measuring rim width code Nominal rim diameter d(mm) Outer diameter D (mm)2 Normal Snow Section width S (mm)3 6.00-16LT 4.50 406 732 743 173 6.50-16LT 4.50 406 755 767 182 6.70-16LT 5.00 406 722 733 191 7.00-13LT 5.00 330 647 658 187 7.00-14LT 5.00 356 670 681 187 7.00-15LT 5.50 381 752 763 202 7.00-16LT 5.50 406 778 788 202 7.10-15LT 5.00 381 738 749 199 7.50-15LT 6.00 381 782 794 220 7.50-16LT 6.00 406 808 819 220 8.25-16LT 6.50 406 859 869 241 9.00-16LT 6.50 406 890 903 257