Document ID: chunk:federal_register_of_legislation:F2018L01517:reg:200:p7
Version: federal_register_of_legislation:F2018L01517
Segment Type: reg
Provision Reference: reg 200 (pt 7/10)
Character Range: 95194–99735

tyres: (a) Highway tread   (b) Heavy tread
3 Overall width may exceed this value up to +6 per cent.

Table D
Code designated tyres for special services
Diagonal and radial
                                                   Nominal rim diameter    Outer diameter
Tyre-size designation   Measuring rim width code   d (mm)                  D (mm)1
(a)                     (b)                        Section width S (mm) 2
10.00-20ML              7.5                        508                     1073            1099   278
11.00-22ML              8                          559                     1155            1182   293
13.00-24ML              9                          610                     1302                   340
14.00-20ML              10                         508                     1266                   375
14.00-24ML              10                         610                     1368                   375

15-19.5ML               11.75                      495                     1019                   389
24 R 21                 18                         533                     1372            -      610

1 Coefficient "b" for the calculation of Dmax : 1.06.
 Category of use:  special (a) Traction tread (b) Heavy tread
2 Overall width may exceed this value up to +8 per cent.

Table E
Code designated tyres mounted on 15° tapered rims
Diagonal and radial
                                                  Nominal rim diameter  Outer diameter
Tyre-size designation1  Measuring rim width code  d (mm)                D (mm)2
Normal
                                                                        Section width
(a)                     (b)                       Snow                  S (mm)3
8-19.5                  6.00                      495                   859                    876    203
8-22.5                  6.00                      572                   935                    952    203
9-22.5                  6.75                      572                   974             982    992    229
10-22.5                 7.50                      572                   1019            1031   1038   254
11-22.5                 8.25                      572                   1054            1067   1073   279
11-24.5                 8.25                      622                   1104            1118   1123   279
12-22.5                 9.00                      572                   1085            1099   1104   300
12-24.5                 9.00                      622                   1135            1150   1155   300
12.5-22.5               9.00                      572                   1085            1099   1104   302
12.5-24.5               9.00                      622                   1135            1150   1155   302

14-17.5                 10.50                     445                   907                    921    349 (-)
15-19.5                 11.75                     495                   1005                   1019   389 (-)
15-22.5                 11.75                     572                   1082                   1095   389 (-)
16.5-22.5               13.00                     572                   1128                   1144   425 (-)
18-19.5                 14.00                     495                   1080                   1096   457 (-)
18-22.5                 14.00                     572                   1158                   1172   457 (-)

       1 Tyres in Radial construction are identified by the letter "R" in place of "-" (e.g. 8R19.5).
           2 Coefficient "b" for the calculation of Dmax : 1.05.
            Category of use:  Normal Service tyres:  (a) Highway tread (b) Heavy tread
           3 Overall width may exceed this value up to +6 per cent
            (-) Overall width may exceed this value up to +5 per cent.
Annex 6
Method of measuring pneumatic tyres
1. The tyre is mounted on the measuring rim specified by the manufacturer pursuant to paragraph 4.1.11. of this Regulation and is inflated to a pressure specified by the manufacturer pursuant to paragraph 4.1.12. of this Regulation.
2. The tyre fitted on its rim is conditioned to the ambient temperature of the laboratory for at least 24 hours.
3. The pressure is readjusted to the value specified in paragraph 1. above.
4. The overall width is measured by caliper at six equally-spaced points, account being taken of the thickness of the protective ribs or bands.  The highest measurement so obtained is taken as the overall width.
5. The outer diameter