Regulation No. 75-00

Name:Regulation No. 75-00
Description:Tyres - L-category Vehicles.
Official Title:Uniform Provisions Concerning the Approval of: Pneumatic Tyres for L-category Vehicles.
Country:ECE - United Nations
Date of Issue:1988-05-19
Amendment Level:00 Series, Supplement 16
Number of Pages:43
Vehicle Types:Motorcycle
Subject Categories:Steering, Wheels and Tyres
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Keywords:

tyre, tyres, speed, test, regulation, width, approval, diameter, rim, maximum, load, means, paragraph, annex, pneumatic, size, code, section, designation, date, category, type, force, symbol, entry, supplement, manufacturer, speeds, tread, amendments, series, table, measuring, nominal, pressure, max, letter, capacity, case, index, number, structure, suitable, service, identified, procedure, outer, min, shown, rating

Text Extract:

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E/ECE/324
) Rev.1/Add.74/Rev.2/Amend.3
E/ECE/TRANS/505 )
February 22, 2017
STATUS OF UNITED NATIONS REGULATION
ECE 75-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
PNEUMATIC TYRES FOR L-CATEGORY VEHICLES
Incorporating:
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 01.03.94
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 01.03.94
Corr. 1 to Supplement 1 to the 00 series of amendments
Dated: 01.03.94
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 23.10.94
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 02.02.95
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 26.02.96
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 26.12.96
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 23.02.97
Corr. 1 to Revision 1 to the 00 series of amendments
Dated: 23.06.97
Supplement 8 to the 00 series of amendments
Date of Entry into Force: 07.05.98
Supplement 9 to the 00 series of amendments
Date of Entry into Force: 07.02.99
Supplement 10 to the 00 series of amendments
Date of Entry into Force: 05.12.01
Supplement 11 to the 00 series of amendments
Date of Entry into Force: 16.07.03
Corr. 2 to Revision 1 to the 00 series of amendments
Dated: 15.07.05
Supplement 12 to the 00 series of amendments
Date of Entry into Force: 03.02.08
Supplement 13 to the 00 series of amendments
Date of Entry into Force: 24.10.09
Corr. 1 to Revision 2 to the 00 series of amendments
Dated: 05.01.12
Supplement 14 to the 00 series of amendments
Date of Entry into Force: 22.01.15
Supplement 15 to the 00 series of amendments
Date of Entry into Force: 08.10.15
Supplement 16 to the 00 series of amendments
Date of Entry into Force: 09.02.17

UNIFORM PROVISIONS CONCERNING THE APPROVAL
OF PNEUMATIC TYRES FOR L-CATEGORY VEHICLES
CONTENTS
REGULATION
1.
Scope
2.
Definitions
3.
Markings
4.
Application for approval
5.
Approval
6.
Requirements
7.
Modifications of the type of pneumatic tyre and extension of approval
8.
Conformity of production
9.
Penalties for non-conformity of production
10.
Production definitely discontinued
11.
Names and Addresses of technical services responsible for conducting approval tests and
of administrative departments
ANNEXES
Annex 1 – Communication concerning the approval or extensions or refusal or withdraw of approval or
production definitely discontinued of a type of pneumatic tyre, for motorcycles and mopeds
pursuant to Regulation No. 75
Annex 2 – Arrangement of the approval mark
Annex 3 – Arrangement of tyre markings - Example of the markings to be borne by types of tyres
placed on the market after the entry into force of this Regulation
Annex 4 – Load capacity index/maximum mass correspondence
Annex 5 – Tyre size designation and dimensions
Annex 6 – Method of measuring pneumatic tyres
Annex 7 – Procedure for load/speed performance tests
Annex 8 – Tyre load capacities at various speeds
Annex 9 – Test Procedure for the dynamic growth of tyres

2.2.3. "Radial" describes a pneumatic tyre structure in which the ply cords extend to the beads
and are laid substantially at 90° to the centreline of the tread, the carcass being stabilised by
an essentially inextensible circumferential belt,
2.2.4. "Reinforced" describes a pneumatic tyre structure in which the carcass is more resistant
than that of the corresponding normal tyre;
2.3. "Bead" means the part of a pneumatic tyre which is of such shape and structure as to fit the
rim and hold the tyre on it;
2.4. "Cord" means the strands forming the fabric of the plies in the pneumatic tyre;
2.5. "Ply" means a layer of rubber-coated parallel cords;
2.6. "Carcass" means that part of a pneumatic tyre other than the tread and the rubber side
walls which, when inflated, bears the load;
2.7. "Tread" means that part of a pneumatic tyre which comes into contact with the ground,
protects the carcass against mechanical damage and contributes to ground adhesion;
2.8. "Side wall" means the part of a pneumatic tyre between the tread and the area designed to
be covered by the rim flange;
2.9. "Tread groove" means the space between two adjacent ribs or blocks in the tread
pattern;
2.10. "Principal groove" means the wide grooves situated in the central zone of the tread;
2.11. "Section width (S)" means the linear distance between the outsides of the side walls of an
inflated pneumatic tyre, excluding elevations due to labelling (marking), decoration or
protective bands or ribs;
2.12. "Overall width" means the linear distance between the outsides of the side walls of an
inflated pneumatic tyre, including labelling (marking), decoration and protective bands or
ribs; in the case of tyres where the tread is wider than the section width, the overall width
corresponds to the tread width;
2.13. "Section height (H)" means a distance equal to half the difference between the outer
diameter of the tyre and the nominal rim diameter;
2.14. "Nominal aspect ratio (Ra)" means the centuple of the number obtained by dividing the
number expressing the section height (H) by the number expressing the nominal section
width (S ), both dimensions expressed in the same units;
2.15. "Outer diameter (D)" means the overall diameter of an inflated new pneumatic tyre;
2.16. "Tyre-size designation" is a designation showing:
2.16.1. The nominal section width (S ) must be expressed in mm except in the case of types of tyre
for which the size designation is shown in the first column of the tables in Annex 5 to this
Regulation,

2.22. "Chunking" means the breaking away of pieces of rubber from the tread;
2.23. "Cord separation" means the parting of the cords from their rubber coating;
2.24. "Ply separation" means the parting of adjacent plies;
2.25. "Tread separation" means the pulling away of the tread from the carcass;
2.26. "Load capacity index" means a figure associated with the maximum load a tyre can carry
at the speed corresponding to its speed symbol according to the operating conditions
specified by the tyre manufacturer. A list of those indices and of the corresponding loads is
given in Annex 4 to this Regulation.
2.27. "Table of tyre load capacities at various speeds" means the table in Annex 8 which
shows, by reference to indices of load capacity and of capacity at nominal speed, load
variations of a tyre if used at speeds other than that corresponding to the index of its
nominal speed category;
2.28. "Speed category" means:
2.28.1. The speeds, expressed by the speed category symbol as shown in the table in
Paragraph 2.28.2.
2.28.2. The speed categories are as shown in the table below:
Speed-category
symbol
B
F
G
J
K
L
M
N
P
Q
R
S
T
U
H
V
W
Corresponding speed
(km/h)
50
80
90
100
110
120
130
140
150
160
170
180
190
200
210
240
270
2.28.3. Tyres suitable for maximum speeds in excess of 240km/h are identified by means of Letter
Codes "V" or "Z" (see Paragraph 2.33.3.) placed within the tyre size designation in front of
the indications of the structure (see Paragraph 3.1.3.).
2.29. "Snow tyre" means a tyre whose tread pattern and whose structure are primarily designed
to ensure in mud and fresh or melting snow a performance better than that of an ordinary
(road-type) tyre. The tread pattern of a snow tyre generally consists of groove (rib) and/or
solid-block elements more widely spaced than on an ordinary (road-type) tyre;

3. MARKINGS
3.1. Pneumatic tyres submitted for approval shall bear on at least one side wall the following
markings:
3.1.1. The trade name or mark;
3.1.2. The tyre size designation as defined in Paragraph 2.16. of this Regulation;
3.1.3. An indication of the structure as follows:
3.1.3.1. On diagonal (bias-ply) tyres, no marking, or the Letter "D",
3.1.3.2. On bias-belted tyres, the Letter "B" placed in front of the rim-diameter marking, and in
addition the words "BIAS-BELTED" can be added,
3.1.3.3. On radial-ply tyres, the Letter "R" placed in front of the rim-diameter marking, and, the word
"RADIAL" can be added,
3.1.4. An indication of the tyre's speed category by means of the symbol shown in
Paragraph 2.28.2. above;
3.1.5. The load-capacity index as defined in Paragraph 2.26. above;
3.1.6. The word "TUBELESS" if the tyre is designed for use without an inner tube;
3.1.7. The word "REINFORCED" or "REINF" if the tyre is a reinforced tyre;
3.1.8. The date of manufacture in the form of a group of four digits, the first two showing the week
and the last two the year of manufacture. This marking, may be affixed to one side wall
only.
3.1.9. The inscription of "M + S" or "M.S" or "M & S" in the case of a snow tyre; The inscription
"DP" (I.E. Dual Purpose) is accepted as a permitted alternative.
3.1.10. The inscription MST in the case of multiservice tyres.
3.1.11. The inscription "MOPED" (or alternatively "CYCLOMOTEUR" or "CICLOMOTORE") in the
case of moped tyres.
3.1.12. An identification of the tyre to rim fitment configuration, when it differs from the standard
configuration, immediately after the rim diameter marking referred to in Paragraph 2.16.3. of
this Regulation.
In the case of tyres intended to be fitted to rims having a diameter equivalent to Code 13
(330mm) or above, this inscription shall be "M/C". This requirement shall not apply to any
tyre sizes listed in the tables of Annex 5 to this Regulation.
3.1.13. Tyres suitable for speeds above 240km/h must be marked with the appropriate Letter
Code "V" or "Z", as applicable (see Paragraph 2.33.3.) in front of the indication of the
structure (see Paragraph 3.1.3.).

4.1.10. The overall dimensions: overall section width, and overall diameter;
4.1.11. The rims on which the tyre can be mounted;
4.1.12. The measuring rim and test rim;
4.1.13. The test and measurement pressures;
4.1.14. The factor X referred to in Paragraph 2.19 above.
4.1.15. For tyres identified by means of Letter Code "V" within the size designation and suitable for
speeds over 240km/h or for tyres identified by means of Letter Code "Z" within the size
designation and suitable for speeds over 270km/h, the maximum speed permitted by the
tyre manufacturer and the load carrying capacity allowed for that maximum speed.
4.1.16. For all terrain (AT) tyres, the symbol identifying the reference inflation pressure (see
Paragraph 3.1.15.).
4.2. The application for approval shall be accompanied (all in triplicate) by a sketch, or a
representative photograph, which identify the tyre tread pattern and a sketch of the
envelope of the inflated tyre mounted on the measuring rim showing the relevant
dimensions (see Paragraphs 6.1.1. and 6.1.2.) of the type submitted for approval. It shall
also be accompanied either by the test report issued by the approved test laboratory or by
one or two samples of the tyre type, at the discretion of the competent authority. Drawings
or photographs of the side wall and tread of the tyre shall be submitted once production has
been established, no later than one year after the date of issue of the type approval.
4.3. Where a tyre manufacturer submits application for type approval for a range of tyres, it is not
considered necessary to carry out a load/speed test on every tyre in the range. Worst case
selection may be made at the discretion of the approval authority.
5. APPROVAL
5.1. If the pneumatic tyre submitted for approval in pursuance of this Regulation meets the
requirements of Paragraph 6 below, approval of that type of tyre shall be granted.
5.2. An approval number shall be assigned to each type-approved. Its first two digits (at
present 00 for the Regulation in its original form) shall indicate the series of amendments
incorporating the most recent major technical amendments made to the Regulation at the
time of issue of the approval. The number so assigned shall not be assigned by the same
Contracting Party to another type of pneumatic tyre.
5.3. Notice of approval or of extension or of refusal or withdrawal of approval of a type of
pneumatic tyre pursuant to this Regulation shall be communicated to the Parties to the
Agreement applying this Regulation, by means of a form conforming to the model in
Annex 1 to this Regulation.
5.3.1. For tyres suitable for speeds above 240km/h, the maximum speed permitted and the
relevant load rating are specified under Item 10 of Annex 1.

6.1.1.2. However, for types of tyres for which the size designation is shown in the first column of the
tables in Annex 5 to this Regulation, the section width shall be allowed to be that given
opposite the tyre designation in the tables.
6.1.2. Outer Diameter of a Tyre
6.1.2.1. The outer diameter of a tyre shall be obtained by means of the following formula:
Where:
D = d + 2H
D
d
H
is the outer diameter expressed in millimetres;
is the nominal rim diameter defined in Paragraph 2.16.3. above expressed in
millimetres;
is the nominal section height rounded to the nearest millimetre and is equal to
H = S x 0.01 Ra, where
S
Ra
is the nominal section width in millimetres;
is the nominal aspect ratio;
all as shown on the sidewall of the tyre in the tyre-size designation in conformity with the
requirements of Paragraph 3.4. above.
6.1.2.2. However, for types of tyres for which the size designation is shown in the first column of the
tables in Annex 5 to this Regulation, the outer diameter shall be allowed to be that given
opposite the tyre designation in the tables.
6.1.3. Method of Measuring Pneumatic Tyres
The dimensions of pneumatic tyres shall be measured by the procedure described in
Annex 6 to this Regulation.
6.1.4. Tyre Section Width Specification
6.1.4.1. The overall width of a tyre may be less than the section width S determined pursuant to
Paragraph 6.1.1. above.
6.1.4.2. It may exceed that value up to the value shown in Annex 5 or for sizes not included in
Annex 5 by the following percentages, whereby the limits shall be rounded to the nearest
millimetre (mm):
6.1.4.2.1. For normal and snow service:
(a) rim diameter code 13 and above: +10%
(b) rim diameter codes up to 12 inclusive: +8%
6.1.4.2.2. For special service tyres which are suitable for limited road use and are marked MST: 25%.

6.2.2. A tyre which after undergoing the load/speed test does not exhibit any tread separation, ply
separation, cord separation, chunking or broken cords shall be deemed to have passed the
test.
6.2.3. The outer diameter of the tyre, measured at least six hours after the load/speed
performance test, must not differ by more than ±3.5% from the outer diameter as measured
before the test.
6.2.4. The overall width of the tyre measured at the end of the load/speed performance test must
not exceed the value determined in Paragraph 6.1.4.2.
6.3. Dynamic Growth of Tyres
The tyres indicated in Paragraph 1.1. of Annex 9 to this Regulation, which have passed the
test for load/speed performance requirements in accordance with Paragraph 6.2. above,
shall be submitted to a dynamic growth test to be carried out in accordance with the
procedure described in the said annex.
7. MODIFICATIONS OF THE TYPE OF PNEUMATIC TYRE AND EXTENSION OF
APPROVAL
7.1. Every modification of the type of pneumatic tyre shall be notified to the administrative
department which approved the type of pneumatic tyre. The department may then either:
7.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and
that in any case, the pneumatic tyre still complies with the requirements; or
7.1.2. Require a further test report from the technical service responsible for conducting the tests.
7.1.3. A modification of the tread pattern of a tyre is deemed as not necessitating a repetition of
the test specified in Paragraph 6.2.
7.1.4. Extensions of approval for tyres suitable for speeds over 240km/h for tyres identified by
means of Letter Code "V" within the size designation (or 270km/h for tyres identified by
means of Letter Code "Z" within the size designation), aiming at certification for different
maximum speeds and/or loads, are permitted provided that a new test report, related to the
new maximum speed and load rating, is supplied by the technical service responsible for
carrying out tests.
Such new load/speed capabilities must be specified in Item 9 of Annex 1.
7.2. Confirmation or refusal of approval, specifying the alterations, shall be communicated by the
procedure specified in Paragraph 5.3. above to the Parties to the Agreement which apply
this Regulation.
7.3. The competent authority granting the extension of approval shall assign a series number to
each communication form drawn up for such an extension.

APPENDIX
EXPLANATORY FIGURE
(See Paragraph 2 of the Regulation)

7. Date of report issued by that service ....................................................................................................
8. Number of report issued by that service ..............................................................................................
9. Reason(s) of extension (if applicable) ..................................................................................................
10. Any remarks .........................................................................................................................................
11. Place ...................................................................................................................................................
12. Date ......................................................................................................................................................
13. Signature ..............................................................................................................................................
14. Annexed to this communication is a list of documents in the approval file deposited at the
Administrative Services having delivered the approval and which can be obtained upon request.

ANNEX 3
ARRANGEMENT OF TYRE MARKINGS
Example of the markings to be borne by types of tyres
placed on the market after the entry into force of
this Regulation
These markings define a pneumatic tyre:
• having a nominal section width of 100;
• having a nominal aspect ratio of 80;
• having a bias-belted structure;
• having a nominal rim diameter of 457mm, for which the code is 18;
• having a load capacity of 206 kg, corresponding to load index 53 in Annex 4 to this Regulation;
• of speed Category S (maximum speed 180km/h);
• for fitting without an inner tube ("tubeless");
• snow tyre manufactured in the twenty-fifth week of the year 2003.
The positioning and order of the markings constituting the tyre designation shall be the following:
(a)
(b)
(c)
(d)
the size designation, comprising the nominal section width, the nominal aspect ratio, the
type-of-structure symbol (where applicable) and the nominal rim diameter shall be grouped as
shown in the above example: 100/80B18;
the load index and the speed-category symbol shall be placed together near the size designation.
They may either follow it or be placed above or below it;
the markings "TUBELESS" and "REINFORCED" or "REINF" and "M + S" and "MST" and/or
"MOPED" (or CYCLOMOTEUR or CICLOMOTORE) may be at a distance from the size
designation symbol.
In case of tyres suitable for speeds above 240km/h the Letter Code "V" or "Z" as applicable, must
be marked in front of the marking of structure (e.g. 140/60ZR18). The reference load capacity
index and speed category symbol must be marked within parenthesis as applicable (see
Paragraph 3.1.14.).

ANNEX 5
TYRE SIZE DESIGNATION AND DIMENSIONS
Table 1
Tyres for motorcycles
Sizes with rim diameter code 12 and below
TYRE SIZE
MEASURING
RIM WIDTH
(CODE)
OVERALL DIAMETER (mm)
D.min D D.max
SECTION
WIDTH
(mm)
MAX.
OVERALL
WIDTH
(mm)
2.50 - 8
2.50 - 9
2.50 - 10
2.50 - 12
1.50
328
354
379
430
338
364
389
440
352
378
403
451
65 70
2.75 - 8
2.75 - 9
2.75 - 10
2.75 - 12
1.75
338
364
389
440
348
374
399
450
363
383
408
462
71 77
3.00 - 4
3.00 - 5
3.00 - 6
3.00 - 7
3.00 - 8
3.00 - 9
3.00 - 10
3.00 - 12
2.10
241
266
291
317
352
378
403
454
251
276
301
327
362
388
413
464
264
291
314
342
378
401
422
473
80 86
3.25 - 8
3.25 - 9
3.25 - 10
3.25 - 12
2.50
362
388
414
465
372
398
424
475
386
412
441
492
88 95
3.50 - 4
3.50 - 5
3.50 - 6
3.50 - 7
3.50 - 8
3.50 - 9
3.50 - 10
3.50 - 12
2.50
264
289
314
340
376
402
427
478
274
299
324
350
386
412
437
488
291
316
341
367
397
430
448
506
92 99
4.00 - 5
4.00 - 6
4.00 - 7
4.00 - 8
4.00 - 10
4.00 - 12
2.50
314
339
365
401
452
505
326
351
377
415
466
517
346
368
394
427
478
538
105 113

TYRE
SIZE
MEASURING
RIM WIDTH
CODE
Table 2
Tyres for Motorcycles Normal Section Size
OVERALL DIAMETER (mm)
D.min D D.max D.max
SECTION
WIDTH
(mm)
MAXIMUM
OVERALL WIDTH
(mm)
1 ¾- 19 1.20 582 589 597 605 50 54 58
2- 14
2- 15
2- 16
2- 17
2- 18
2- 19
2- 20
2- 21
2- 22
2 ¼- 14
2 ¼- 15
2 ¼- 16
2 ¼- 17
2 ¼- 18
2 ¼- 19
2 ¼- 20
2 ¼- 21
2 ¼- 22
2 ½- 14
2 ½- 15
2 ½- 16
2 ½- 17
2 ½- 18
2 ½- 19
2 ½- 20
2 ½- 21
2 ½- 22
2 ¾- 14
2 ¾- 15
2 ¾- 16
2 ¾- 17
2 ¾- 18
2 ¾- 19
2 ¾- 20
2 ¾- 21
2 ¾- 22
1.35
1.50
1.60
1.85
461
486
511
537
562
588
613
638
663
474
499
524
550
575
601
626
651
677
489
514
539
565
590
616
641
666
692
499
524
549
575
600
626
651
676
702
468
493
518
544
569
595
620
645
670
482
507
532
558
583
609
634
659
685
498
523
548
574
599
625
650
675
701
508
533
558
584
609
635
660
685
711
477
501
526
552
577
603
628
653
680
492
517
540
566
591
617
642
667
695
508
533
558
584
609
635
660
685
711
518
545
568
594
621
645
670
695
721
484
509
534
560
585
611
636
661
686
500
525
550
576
601
627
652
677
703
520
545
570
596
621
647
672
697
723
530
555
580
606
631
657
682
707
733
55 58 63
62 66 71
68 72 78
75 80 86

Table 3 (Continued)
TYRE
SIZE
MEASURING
RIM WIDTH
CODE
OVERALL DIAMETER (mm)
D.min D D.max D.max
SECTION
WIDTH
(mm)
MAXIMUM
OVERALL WIDTH
(mm)
2.50 - 14
2.50 - 15
2.50 - 16
2.50 - 17
2.50 - 18
2.50 - 19
2.50 - 21
1.60
486
511
536
562
587
613
663
492
517
542
568
593
619
669
506
531
556
582
607
633
683
508
533
558
584
609
635
685
65 72 75 79
2.75 - 14
2.75 - 15
2.75 - 16
2.75 - 17
2.75 - 18
2.75 - 19
2.75 - 21
1.85
505
530
555
581
606
632
682
512
537
562
588
613
639
689
524
549
574
600
625
651
701
530
555
580
606
631
657
707
75 83 86 91
3.00 - 14
3.00 - 15
3.00 - 16
3.00 - 17
3.00 - 18
3.00 - 19
3.00 - 21
3.00 - 23
1.85
519
546
569
595
618
644
694
747
526
551
576
602
627
653
703
754
540
565
590
616
641
667
717
768
546
571
596
622
647
673
723
774
80 88 92 97
3.25 - 14
3.25 - 15
3.25 - 16
3.25 - 17
3.25 - 18
3.25 - 19
3.25 - 21
2.15
531
556
581
607
630
656
708
538
563
588
614
639
665
715
552
577
602
628
653
679
729
560
585
610
636
661
687
737
89 98 102 108
3.50 - 14
3.50 - 15
3.50 - 16
3.50 - 17
3.50 - 18
3.50 - 19
3.50 - 21
2.15
539
564
591
617
640
666
716
548
573
598
624
649
675
725
564
589
614
640
665
691
741
572
597
622
648
673
699
749
93 102 107 113

Table 4
Tyres for motorcycles
Low section size
TYRE SIZE
MEASURING
RIM WIDTH
CODE
OVERALL DIAMETER (mm)
D.min D D.max D.max
SECTION
WIDTH
(mm)
MAXIMUM
OVERALL WIDTH
(mm)
3.60 - 18
3.60 - 19
2.15
605
631
615
641
628
653
633
658
93 102 108 113
4.10 - 18
4.10 - 19
2.50
629
655
641
667
654
679
663
688
108 119 124 130
5.10 - 16
5.10 - 17
5.10 - 18
3.00
615
641
666
625
651
676
643
670
694
651
677
702
129 142 150 157
4.25/85–18 2.50 649 659 673 683 112 123 129 137
4.60 - 16
4.60 - 17
4.60 - 18
2.75
594
619
644
604
630
654
619
642
670
628
654
678
117 129 136 142
6.10 - 16 4.00 646 658 678 688 168 185 195 203

Table 7
Motorcycle tyres
Sizes and Dimensions of American Tyres
TYRE SIZE
MEASURING
RIM WIDTH
CODE
OVERALL DIAMETER (mm)
D.min D D.max
SECTION
WIDTH
(mm)
MAX.
OVERALL
WIDTH (mm)
MH90- 21 1.85 682 686 700 80 89
MJ90 -
MJ90 -
18
19
2.15
2.15
620
645
625
650
640
665
89 99
ML90 -
ML90 -
18
19
2.15
2.15
629
654
634
659
650
675
93 103
MM90 -
19
2.15
663
669
685
95
106
MN90 -
18
2.15
656
662
681
104
116
MP90 -
18
2.15
667
673
692
108
120
MR90 -
18
2.15
680
687
708
114
127
MS90 -
17
2.50
660
667
688
121
134
MT90 -
MT90 -
16
17
3.00
3.00
642
668
650
675
672
697
130 144
MU90 -
MU90 -
15M/C
16
3.50
3.50
634
659
642
667
665
690
142 158
MV90 -
15M/C
3.50
643
651
675
150
172
MP85 -
18
2.15
654
660
679
108
120
MR85 -
16
2.15
617
623
643
114
127
MS85 -
18
2.50
675
682
702
121
134
MT85 -
18
3.00
681
688
709
130
144
MU85
16M/C
3.50
650
658
681
142
158
MV85 -
15M/C
3.50
627
635
658
150
172

Table 8 (2 of 3)
Tyres for All Terrain Vehicles (AT Tyres)

ANNEX 6
METHOD OF MEASURING PNEUMATIC TYRES
1. The tyre is mounted on the measuring rim specified by the manufacturer pursuant to
Paragraph 4.1.12. of this Regulation and is inflated to a pressure specified by the
manufacturer.
Standard
Reinforced
Motorcycle
Derivatives
Moped
Tyre Version
4PR
Speed Category
Pressure
bar kPa
F, G, J, K, L, M, N, P, Q, R, S 2.25 225
T, U, H, V, W 2.80 280
F to P
Q, R, S, T, U, H, V 3.30 330
3.50 350
F to M
6PR 4.00 400
8PR 4.50 450
Standard
Reinforced
B
B
2.25
2.80
All Terrain (AT) All 0.25 25
225
280
All 0.35 35
All 0.45 45
For other tyre versions, inflate to the pressure specified by the tyre manufacturer.
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 calliper 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 is determined by measuring the maximum circumference and dividing
the figure so obtained by π (3.1416)

2. TEST PROCEDURE
2.1. Mount the tyre-and-wheel assembly on the test axle and press it against the outer face of a
smooth test drum of 1.70m ±1% or 2.0m ±1% in diameter.
2.2. Apply to the test axle a load equal to 65% of:
2.2.1. The maximum load rating equated to the Load Capacity Index for tyres with speed symbols
up to H inclusive.
2.2.2. The maximum load rating associated with a maximum speed of 240km/h for tyres with
speed symbol "V" (see Paragraph 2.33.3. of this Regulation),
2.2.3. The maximum load rating associated with a maximum speed of 270km/h for tyres with
speed symbol "W" (see Paragraph 2.33.3.),
2.2.4. The maximum load rating associated with the maximum speed specified by the tyre
manufacturer for tyres suitable for speeds above 240km/h (or 270km/h as applicable) (see
Paragraph 6.2.1.1.).
2.2.5. In case of moped tyres (speed category symbol B) the test load is 65% on a 1.7m diameter
test drum and 67% on a 2.0m diameter test drum.
2.3. The tyre pressure must not be corrected throughout the test and the test load must be kept
constant.
2.4. During the test the temperature in the test room must be maintained between 20°C and
30°C or at a higher temperature if the manufacturer so agrees.
2.5. The test shall be run without interruption, in accordance with the following:
2.5.1. 20min is allowed to build up from zero to the initial test speed;
2.5.2. Initial test speed: 30km/h less than the speed corresponding to the speed category symbol
marked on the tyre (see Paragraph 2.28.2. of this Regulation) if a 2.0m diameter test drum
is used, or 40km/h less if a 1.7m diameter test drum is used.
2.5.2.1. The initial test speed for the second test in case of tyres suitable for speeds above 240km/h
for tyres identified by means of letter Code "V" within the size designation (or 270km/h for
tyres identified by means of letter Code "Z" within the size designation) is 30km/h less than
the maximum speed specified by the tyre manufacturer (see Paragraph 4.1.15. of this
Regulation) if a 2.0m diameter test drum is used, or 40km/h less if a 1.7m diameter test
drum is used.
2.5.3. Speed steps of 10km/h;
2.5.4. Test duration at each speed step: 10min;
2.5.5. Total duration of the test: 1 hour;

ANNEX 8
TYRE LOAD CAPACITY AT VARIOUS SPEEDS
VARIATION IN LOAD CARRYING CAPACITY (%)
SPEED
(km/h)
Moped
Rim Diameter Code up
to 12 inclusive
Speed Symbol
Rim Diameter Code
13 and above
Speed Symbol
B J K L J K L M N
P and
above
30 +30 +30
+30
50 0 +30 +30
60 +23 SEE COLUMN J +23
SEE COLUMN J
70
+16
+16
80
+10
+10
+14
90
+5
+7,5
+5
+7,5
+7,5
+7,5
+12
100

3.4.1. Road tyres in bias and bias/belted construction.
Speed Category
Tyre construction
Testing pressure
bar
kPa
P/Q/R/S standard 2.5 250
T and above standard 2.9 290
3.5. The tyre/wheel assembly shall be stored at the temperature of the testing room for a period of
at least three hours.
3.6. After this conditioning storage period the inflation pressure shall be readjusted to the value
indicated in Paragraph 3.4.
3.7. Mount the tyre and rim assembly on the test axle and ensure the assembly is freely rotating.
The tyre can be rotated either by means of a drive motor acting on the tyre axis or by pressing
it against a test drum.
3.8. Accelerate the assembly without interruption to reach within 5min the maximum speed
capability of the tyre.
3.9. Position the contour outline device and ascertain that it is perpendicular to the rotation of the
test tyre tread.
3.10. Check that the peripheral speed of the tread surface is within ±2% of the maximum speed
capability for the tyre. Maintain the equipment at constant speed for at least 5min and then
portray the tyre cross-section in the area of maximum deformation, or check that the tyre does
not exceed the enveloping curve.

In accordance with Paragraphs 6.1.4. and 6.1.5. of the Regulation, the following limit values
have been established for the enveloping curve:
Speed Category
Category of Use:
Normal
H (mm)
Category of Use:
Snow and special
P/Q/R/S H × 1.10 H × 1.15
T/U/H H × 1.13 H × 1.18
Over 210km/h H × 1.16 –
4.1.1. The main dimensions of the enveloping curve must be adjusted, if applicable, taking into
account the constant ratio K (see Paragraph 2.2. above).
4.2. The contour of the tyre portrayed at the maximum speed shall not exceed the enveloping
curve, with reference to the tyre axes.
4.3. The tyre is not subjected to a further test.
Tyres - L-category Vehicles.