Regulation No. 54-00 Proposed Supplement 21

Name:Regulation No. 54-00 Proposed Supplement 21
Description:Tyres - Commercial Vehicles. Proposed Supplement 21 to the 00 Series.
Official Title:Proposal for Supplement 21 to Regulation No. 54 (Tyres for Commercial Vehicles and their Trailers).
Country:ECE - United Nations
Date of Issue:2016-04-08
Amendment Level:Original
Number of Pages:14
Information:Provisional Date of Entry into Force: February 9, 2017
Vehicle Types:Bus, Component, Heavy Truck, Light Truck, Trailer
Subject Categories:Drafts and Proposals (Historical)
Available on InterRegs.NET

Our online subscription service, offering immediate access to our extensive library of global vehicle regulations, standards and legislation. A fully searchable, accurate, user-friendly resource for consolidated regulations that are updated quickly and frequently.

Tell me more | Already a subscriber

Available on SelectRegs.com

Our fast and easy means of purchasing up-to-date global vehicle and component standards and regulations on a pay-as-you-go basis. Pay securely by credit card and your documents are delivered directly and immediately to your computer as PDF files.

Tell me more | Go straight to site

Keywords:

tyre, paragraph, read, amend, tyres, manufacturer, diameter, approval, width, regulation, rim, nominal, outer, section, designation, category, annex, type, means, snow, brand, trademark, measuring, commercial, load, speed, rounded, millimetres, tyre-size, nearest, pressure, normal, trade, pursuant, description, special, diagonal, symbol, code, vehicles, approved, index, expressed, paragraphs, sidewall, case, shown, test, conformity, inscription

Text Extract:

All InterRegs documents are formatted as PDF files and contain the full text, tables, diagrams and illustrations of the original as issued by the national government authority. We do not re-word, summarise, cut or interpret the regulatory documents. They are consolidated, published in English, and updated on a regular basis. The following text extract indicates the scope of the document, but does not represent the actual PDF content.

ECE/TRANS/WP.29/2016/52
PROPOSAL FOR SUPPLEMENT 21 TO THE 00 SERIES OF
AMENDMENTS TO
REGULATION NO. 54
(TYRES FOR COMMERCIAL VEHICLES AND THEIR TRAILERS)
ADOPTED AT THE 169 SESSION – JUNE 2016
PROVISIONAL DATE OF ENTRY INTO FORCE: FEBRUARY 9, 2017

Renumber Paragraphs 2.2. to 2.31. as 2.5. to 2.34. and in these renumbered paragraphs, replace
"pneumatic tyre" by "tyre".
Paragraph 2.17.1.3.1., amend to read:
"2.17.1.3.1. 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
203
9
229
10
254
11
279
12
305
13
330
14
356
15
381
16
406
17
432
18
457
19
483
20
508
21
533
22
559
24
610
25
635
14.5
368
16.5
419
17.5
445
19.5
495
20.5
521
22.5
572
24.5
622
26
660
28
711
30
762
"

4.1.2. The Manufacturer's Name;
4.1.2.1. The Brand name(s)/trademark(s);
4.1.2.2. The trade description(s)/commercial name(s)."
Paragraph 4.1.3., amend to read:
"4.1.3. Category of Use (Normal Tyre, Snow Tyre, Special Use Tyre);
4.1.3.1. For the tyres belonging to the category of use "special use tyre" those which may bear
the inscription M+S or M.S or M&S."
Paragraph 4.1.6., amend to read:
"4.1.6. The Load-capacity Indexes;"
Paragraph 4.1.12., amend to read:
"4.1.12. The inflation pressure for the dimension measurement and for the load/speed endurance
test pressure;"
Replace in Paragraphs 5.1., 5.2., 5.3., 5.4., 6.1.3., 6.2.1., 6.2.4., 6.2., 5., 9.1. and 10. "pneumatic tyre" by
"tyre"
Paragraph 6.1.1.1., amend to read:
"6.1.1.1. The section width shall be obtained by means of the following formula:
Where:
S = S + K (A - A ),
S
S
A
A
is the "section width" rounded to the nearest millimetre and measured on the
measuring rim;
is "the nominal section width" in millimetres, as shown on the sidewall of the tyre
in the tyre designation as prescribed;
is the width of the measuring rim in millimetres, as shown by the manufacturer in
the descriptive note; and
is the width of the theoretical rim in millimetres.
A shall be taken to equal S multiplied by the factor x as specified by the manufacturer,
and K shall be taken to equal 0.4."

Paragraph 6.1.5.1., amend to read:
"6.1.5.1. For sizes listed in Annex 5 and for tyres identified by the "tyre to rim fitment
configuration" (see Paragraph 3.1.11.) symbol "A", the nominal section height H is equal
to:
H = 0.5 (D-d) , rounded to the nearest mm - for references see Paragraph 6.1.2.1."
Paragraph 6.1.5.3.3., amend to read:
"6.1.5.3.3. For snow tyres the outer diameter shall not exceed the following value
D = 1.01 ⋅ D rounded to the nearest mm
where D is the maximum outer diameter established in conformity with the above.
For tyres of the category of use "snow tyre" the outer diameter (D
conformity with the above may be exceeded by one per cent."
) established in
Paragraph 11., amend to read:
"11.1. The Contracting Parties to the 1958 Agreement which apply this Regulation shall
communicate to the United Nations Secretariat the names and addresses of the
technical services responsible for conducting approval tests and, where applicable, of
the approved test laboratories and of the Type Approval Authorities which grant approval
and to which forms certifying approval or extension of approval or refusal of approval or
withdrawal of approval or production definitively discontinued, issued in other countries,
are to be sent.
11.2. The Contracting Parties to the 1958 Agreement which apply this Regulation may
designate laboratories of tyre manufacturers, as approved, test laboratories.
11.3. Where a Contracting Party to the 1958 Agreement applies Paragraph 11.2. above, it
may, if it so desires, be represented at the tests by one or more persons of its choice."
Annex 1, amend to read:
"COMMUNICATION


of a type of tyre for motor vehicles pursuant to Regulation No. 54."
Item 1. amend to read:
"1. Manufacturer's name and address : ................................................................................... "

Annex 5, Part II, Table B, add the following entries:
"Table B
Tyres for Light Commercial Vehicles (High Flotation Tyres)
Diagonal and Radial
Tyre-size
designation
Measuring rim
width code
Nominal rim
diameter d (mm)
Outer diameter D
(mm) Section width S (mm)
Normal
Snow
9-15LT 8.00 381 744 755 254
10-15LT 8.00 381 773 783 264
11-15LT 8.00 381 777 788 279
24x7.50-13LT
6.00
330
597
604
191
27x8.50-14LT
7.00
356
674
680
218
28x8.50-15LT
7.00
381
699
705
218
29x9.50-15LT
7.50
381
724
731
240
30x9.50-15LT
7.50
381
750
756
240
31x10.50-15LT
8.50
381
775
781
268
31x11.50-15LT
9.00
381
775
781
290
31x12.50R15LT
10.00
381
775
781
318
31x13.50-15LT
11.00
381
775
781
345
31x15.50-15LT
12.00
381
775
781
390
32x11.50-15LT
9.00
381
801
807
290
33x9.50 R15LT
7.50
381
826
832
240
33x10.50R15LT
8.50
381
826
832
268
33x10.50R17LT
8.50
432
826
832
268
33x10.50R18LT
8.50
457
826
832
268
33x11.50R18LT
9.00
457
826
832
290
33x12.50-15LT
10.00
381
826
832
318
33x12.50R17LT
10.00
432
826
832
318
33x12.50R18LT
10.00
457
826
832
318
33x12.50R20LT
10.00
508
826
832
318

Tyre-size
designation
Measuring rim
width code
Nominal rim
diameter d (mm)
Outer diameter D
(mm) Section width S (mm)
Normal
Snow
37x13.50R18LT
11.00
457
928
934
345
37x13.50R20LT
11.00
508
928
934
345
37x13.50R22LT
11.00
559
928
934
345
37x13.50R24LT
11.00
610
928
934
345
37x14.50-15LT
12.00
381
928
934
372
38x13.50R17LT
11.00
432
953
959
345
38x13.50R20LT
11.00
508
953
959
345
38x13.50R22LT
11.00
559
953
959
345
38x13.50R24LT
11.00
610
953
959
345
38x14.50R17LT
12.00
432
953
959
372
38x14.50R18LT
12.00
457
953
959
372
38x14.50R20LT
12.00
508
953
959
372
38x15.50R15LT
12.00
381
953
959
390
38x15.50R17LT
12.00
432
953
959
390
38x15.50R18LT
12.00
457
953
959
390
38x15.50R20LT
12.00
508
953
959
390
39x13.50R17LT
11.00
432
978
985
345
40x13.50R17LT
11.00
432
1,004
1,010
345
40x13.50R20LT
11.00
508
1,004
1,010
345
40x14.50R17LT
12.00
432
1,004
1,010
372
40x14.50R18LT
12.00
457
1,004
1,010
372
40x14.50R20LT
12.00
508
1,004
1,010
372
40x15.50R20LT
12.00
508
1,004
1,010
390
40x15.50R22LT
12.00
559
1,004
1,010
390
40x15.50R24LT
12.00
610
1,004
1,010
390
42x14.50R17LT
12.00
432
1,055
1,061
372

Annex 6, title, amend to read:
"METHOD OF DIMENSION MEASUREMENT FOR MEASURING TYRES"
Paragraph 1., amend to read:
"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 the pressure specified by the
manufacturer pursuant to Paragraph 4.1.12. of this Regulation."
Annex 7,
Paragraph 1.3., amend to read:
"1.3. Inflate the tyre to the pressure corresponding to the pressure specified by the
manufacturer pursuant to Paragraph 4.1.12. of this regulation"
Appendix 1, amend to read:
"Endurance-test programme
Load index
122 or more
121 or less
Notes:
Tyre speed
category symbol
Radial-ply
km.h
Test-drum speed
Diagonal (biasply)
km.h
Load placed on the wheel as a
percentage of the load
corresponding to the load index
7h. 16h. 24h.
F
32
32
G
40
32
J
48
40
K
56
48
L 64 -
M 72 -
66%
84%
101
F
32
32
G
40
40
J
48
48
K
56
56
L
64
56
70%
88%
106%
4h
6h
M
80
64
75%
97%
114%
N
88

75%
97%
114%
P
96

75%
97%
114%
"

Tyres - Commercial Vehicles. Proposed Supplement 21 to the 00 Series.