2023 June 5 |
Tyres and abrasion: Ice and 3PMSF tyres | TA-14-06
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2023-06-05 |
2023-06-05 12:19:38 UTC |
2023 May 23 |
UN R117: Noise-measurement uncertainties table | TFMU-24-03
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2023-05-23 |
2023-05-23 10:18:47 UTC |
2023 May 23 |
UN R117: Proposal for Supplement 2 to the 04 series of amendments | TFMU-24-04
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2023-05-23 |
2023-05-23 10:21:37 UTC |
2023 May 23 |
UN R117: Proposal for C2 noise temperature correction update | TFMU-24-05
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2023-05-23 |
2023-05-23 10:23:36 UTC |
2023 May 11 |
Tyre abrasion: Opinion on C1 Tyre Market Assessment | TA-13-04
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2023-05-11 |
2023-05-11 11:31:08 UTC |
2023 April 25 |
Tyre abrasion: Rationale for excluding ice tyres from the scope | TA-12-04
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2023-04-25 |
2023-05-10 16:06:39 UTC |
2023 April 6 |
Tyre abrasion: Status of correlation and validation testing | TA-11-03
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2023-04-06 |
2023-04-06 14:28:54 UTC |
2023 March 20 |
Worn tyres: Comments on water-depth measurement test plan | WDM-3-02
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2023-03-20 |
2023-03-20 17:01:59 UTC |
2023 March 5 |
Tyre abrasion: Pros and cons of UN GTR and UN Regulation | TA-09-03/Rev.2
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2023-03-05 |
2023-02-10 09:14:03 UTC |
2023 February 15 |
Worn tyres: Input on options for water depth measurement | WDM-1-02
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2023-02-15 |
2023-02-15 18:15:31 UTC |
2023 February 6 |
Tyre abrasion rate measurement: Vehicle method description | TA-09-02
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2023-02-06 |
2023-02-09 18:15:52 UTC |
2023 February 3 |
UN R75: Proposal to amend document GRBP/2023/7 | GRBP-77-21
Document Title: UN R75: Proposal to amend document GRBP/2023/7
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Document Reference Number: GRBP-77-21
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Description: Editorial amendment to align the definition of “special tyre” with the proposal for the snow tyre definition in paragraph 2.33.
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Submitted by: ETRTO
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Meeting Session: 77th GRBP session (7-10
Feb)
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Document date: 31 Jan 23 (Posted 03 Feb 23)
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Document status: Formal GR review
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This document concerns UN Regulation No. 75 | Motorcycle and Moped Tires.
This submission is related to the following document(s):
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2023-02-03 |
2023-02-03 08:48:12 UTC |
2023 February 3 |
UN R109: Proposal to amend document GRBP/2023/10 | GRBP-77-22
Document Title: UN R109: Proposal to amend document GRBP/2023/10
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Document Reference Number: GRBP-77-22
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Description: Proposal to supersede GRBP/2023/10 with a more flexible approach appropriate for covering the operations of small retreaders.
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Submitted by: ETRTO
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Meeting Session: 77th GRBP session (7-10
Feb)
|
Document date: 31 Jan 23 (Posted 03 Feb 23)
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Document status: Formal GR review
|
This document concerns UN Regulation No. 109 | Retreaded Tires for Commercial Vehicles.
This submission is related to the following document(s):
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2023-02-03 |
2023-02-03 08:54:58 UTC |
2023 February 3 |
UN R54: Proposal to supersede document GRBP/2023/11 | GRBP-77-24
Document Title: UN R54: Proposal to supersede document GRBP/2023/11
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Document Reference Number: GRBP-77-24
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Description: Proposal to replace GRBP/2023/11 with a revised proposal to address the following:
1. “Special use” tyres with nominal rim diameters larger than those listed in the present table (rim diameters up to 42, section widths up to 750 mm and overall diameters over 2 meters) and with speed symbols F and above have been announced in the European market as original equipment of N3G “special purpose vehicles” (i.e., special high speed self-propelled vehicles for agricultural and forestry use, like wood choppers).
2. Existing multi-purpose tyres (MPT) (classified as “special use tyres” as per paragraphs 2.5.3. and 3.1.13.), already type approved since years, have a tread pattern with lugs or cleats in addition to those with blocks, as evidenced by the attached slide showing some examples. It is proposed to amend paragraph 6.3.1. by clarifying that lugs and cleats are possible shapes of the mentioned blocks.
3. Testing tyres with very large overall diameters, sometimes over 2 m, on a test drum with a diameter of 1.70 m ± 1 % would be unpracticable. For practical reasons most of those tyres are regularly tested on drums with a diameter of 3 m or even larger. The proposal carries equivalence provisions from UN R106 to justify the equivalence of the test method as required by Annex 7 in point 4 “Equivalent test methods" and clarifies based on UN R117 the formula already used indirectly.
4. Some commercial vehicles are often used in the market at a reduced speed of 70 km/h with a load-capacity of the tyres increased as per load/speed combination defined in the table of Annex 8. The proposal would allow use of the speed category symbol E (but restrict it to “additional service description”) to provide this information.
5. Considering that 32 km/h is already a floor value for the test-drum speed for diagonal tyres, ETRTO proposes not to apply to E speed category symbol tyres the linear decrease of the test-drum speed in function of the decrease of the speed category symbol by keeping, for safety reasons, the same test-drum speed as for F speed category symbol tyres, i.e., 32 km/h).
6. In the case of additional service descriptions mentioned in paragraph 6.2.5.1., it is proposed not to perform the additional load/speed test because the load-capacity approximates with a negligeable difference the reduction or the increase in percentage of the nominal load/speed combination applicable to the nominal speed category symbol (see Annex 8). An example of the actual differences (in percentage and in absolute value) is provided.
7. Type approval applications for radial tyres with load capacity index greater or equal to 122 and without the additional marking “LT”, or “C” have been done in the past for the speed category symbol N for which the load/speed endurance test procedure is not described in Annex 7, Appendix 1. To type approve such tyres the test speed was separately defined by the different involved Type Approval Authorities. In order to harmonize the test procedure to be used for the type approval of such tyres, it is proposed to amend the Annex 7, Appendix 1 by introducing testing conditions in line with the rule applied for defining the test speed of radial tyres with load capacity index greater or equal to 122 (i.e. starting from 32 km/h set for F speed category symbol, the test speed is increased by 8 km/h respect to the one set for the previous speed category symbol).
8. The definition of “snow tyre” is amended to clarify that “snow tyres” are not only suitable for the use in snow conditions but also on mud and by replacing the term “maintain vehicle motion” (i.e. keeping the vehicle speed and direction of movement constant) by a more general concept of “controlling vehicle motion” (i.e. also being able to change the vehicle speed and direction of movement as intended).
9. It is proposed to explicitly allow other technical measurement solutions of the tyre overall width by removing the words “by caliper” which fix a technical limitation. The removal of this technical limitation would be advisable following the principle of not stopping the technical innovations.
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Submitted by: ETRTO
|
Meeting Session: 77th GRBP session (7-10
Feb)
|
Document date: 01 Feb 23 (Posted 03 Feb 23)
|
Document status: Formal GR review
|
This document concerns UN Regulation No. 54 | Commercial Vehicle Tyres.
This submission is related to the following document(s):
|
|
2023-02-03 |
2023-02-03 09:04:21 UTC |
2023 January 31 |
Tyre Abrasion: Validation, Correlation and Alignment Plan | TA-08-05
|
2023-01-31 |
2023-01-31 17:15:23 UTC |
2023 January 30 |
UN R117: Proposed updates to C1 tyre temperature-correction provisions | IWGMU-22-04/Rev.1
|
2023-01-30 |
2023-01-24 10:59:52 UTC |
2022 December 9 |
Difference between tire abrasion and tire mileage measurement | TA-07-05
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2022-12-09 |
2023-01-25 13:47:17 UTC |
2022 December 9 |
Tyre Abrasion: Vehicle Load Normalization | TA-07-07
|
2022-12-09 |
2023-01-25 14:14:32 UTC |
2022 December 9 |
Tyre abrasion: Tyre selection for Correlation Test Plan | TA-07-06
|
2022-12-09 |
2023-01-25 14:17:12 UTC |
2022 November 25 |
UN R54: Proposal for amendments | GRBP/2023/11
Document Title: UN R54: Proposal for amendments
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Document Reference Number: GRBP/2023/11
|
Description: Proposal to address the following:
1. “Special use” tyres with nominal rim diameters larger than those listed in the present table (rim diameters up to 42, section widths up to 750 mm and overall diameters over 2 meters) and with speed symbols F and above have been announced in the European market as original equipment of N3G “special purpose vehicles” (i.e., special high speed self-propelled vehicles for agricultural and forestry use, like wood choppers).
2. Existing multi-purpose tyres (MPT) (classified as “special use tyres” as per paragraphs 2.5.3. and 3.1.13.), already type approved since years, have a tread pattern with lugs or cleats in addition to those with blocks, as evidenced by the attached slide showing some examples. It is proposed to amend paragraph 6.3.1. by clarifying that lugs and cleats are possible shapes of the mentioned blocks.
3. Testing tyres with very large overall diameters, sometimes over 2 m, on a test drum with a diameter of 1.70 m ± 1 % would be unpracticable. For practical reasons most of those
tyres are regularly tested on drums with a diameter of 3 m or even larger. The proposal carries equivalence provisions from UN R106 to justify the equivalence of the test method as required by Annex 7 in point 4 “Equivalent test methods" and clarifies based on UN R117 the formula already used indirectly.
4. Some commercial vehicles are often used in the market at a reduced speed of 70 km/h with a load-capacity of the tyres increased as per load/speed combination defined in the table of Annex 8. The proposal would allow use of the speed category symbol E (but restrict it to “additional service description”) to provide this information.
5. Considering that 32 km/h is already a floor value for the test-drum speed for diagonal tyres, ETRTO proposes not to apply to E speed category symbol tyres the linear decrease of
the test-drum speed in function of the decrease of the speed category symbol by keeping, for safety reasons, the same test-drum speed as for F speed category symbol tyres, i.e., 32 km/h).
6. In the case of additional service descriptions mentioned in paragraph 6.2.5.1., it is proposed not to perform the additional load/speed test because the load-capacity approximates with a negligeable difference the reduction or the increase in percentage of the nominal load/speed combination applicable to the nominal speed category symbol (see Annex 8).
7. Type approval applications for radial tyres with load capacity index greater or equal to 122 and without the additional marking “LT”, or “C” have been done in the past for the speed category symbol N for which the load/speed endurance test procedure is not described in Annex 7, Appendix 1. To type approve such tyres the test speed was separately defined by the different involved Type Approval Authorities. In order to harmonize the test procedure to be used for the type approval of such tyres, it is proposed to amend the Annex 7, Appendix 1 by introducing testing conditions in line with the rule applied for defining the test speed of radial tyres with load capacity index greater or equal to 122 (i.e. starting from 32 km/h set for F speed category symbol, the test speed is increased by 8 km/h respect to the one set for the previous speed category symbol).
8. The definition of “snow tyre” is amended to clarify that “snow tyres” are not only suitable for the use in snow conditions but also on mud and by replacing the term “maintain vehicle motion” (i.e. keeping the vehicle speed and direction of movement constant) by a more general concept of “controlling vehicle motion” (i.e. also being able to change the vehicle speed and direction of movement as intended).
9. It is proposed to explicitly allow other technical measurement solutions of the tyre overall width by removing the words “by caliper” which fix a technical limitation. The removal of this technical limitation would be advisable following the principle of not stopping the technical innovations.
10. Editorial corrections are introduced to ensure that the terms “load-capacity” and “speed category symbol” are used consistently throughout the text and to remove some typing mistakes present in the current text.
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Submitted by: ETRTO
|
Meeting Session: 77th GRBP session (7-10
Feb)
|
Document date: 25 Nov 22 (Posted 25 Nov 22)
|
Document status: Formal GR review
|
This document concerns UN Regulation No. 54 | Commercial Vehicle Tyres.
This submission is related to the following document(s):
|
|
2022-11-25 |
2022-11-26 18:49:10 UTC |
2022 November 25 |
UN R75: Proposal for amendments | GRBP/2023/7
Document Title: UN R75: Proposal for amendments
|
Document Reference Number: GRBP/2023/7
|
Description: Proposal to explicitly allow other technical measurement solutions of the tyre overall width by removing the words “by calliper”, add the definition of “special tyre”, clarify the definition of “snow tyre”, to enable the case of a “special tyre” fulfilling the definition of a “snow” tyre, clarify application of the suffix “M/C”, and make editorial corrections and clarifications.
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Submitted by: ETRTO
|
Meeting Session: 77th GRBP session (7-10
Feb)
|
Document date: 25 Nov 22 (Posted 25 Nov 22)
|
Document status: Formal GR review
|
This document concerns UN Regulation No. 75 | Motorcycle and Moped Tires.
This submission is related to the following document(s):
|
|
2022-11-25 |
2022-11-26 18:56:51 UTC |
2022 November 25 |
UN R117: Proposal for amendments | GRBP/2023/8
|
2022-11-25 |
2022-11-27 10:41:24 UTC |
2022 November 25 |
UN R106: Proposal for amendments | GRBP/2023/9
Document Title: UN R106: Proposal for amendments
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Document Reference Number: GRBP/2023/9
|
Description: Proposal to extend the scope of the speed category E to align with the technical evolution of agricultural and forestry vehicles.
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Submitted by: ETRTO
|
Meeting Session: 77th GRBP session (7-10
Feb)
|
Document date: 25 Nov 22 (Posted 25 Nov 22)
|
Document status: Formal GR review
|
This document concerns UN Regulation No. 106 | Tires for Agricultural Vehicles.
|
|
2022-11-25 |
2022-11-27 10:44:56 UTC |
2022 November 25 |
UN R109: Proposal for amendments | GRBP/2023/10
Document Title: UN R109: Proposal for amendments
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Document Reference Number: GRBP/2023/10
|
Description: The prescription given in paragraph 3.5.2., which will be implemented through document WP.29/2022/7/Rev.1 adopted by WP.29, contradicts the previously existing prescription in paragraph 3.2.9. This proposal aims to resolve the contradiction by amending paragraph 3.5.2. to introduce a reference to the prescriptions given in paragraph 3.2.9.
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Submitted by: ETRTO
|
Meeting Session: 77th GRBP session (7-10
Feb)
|
Document date: 25 Nov 22 (Posted 25 Nov 22)
|
Document status: Formal GR review
|
This document concerns UN Regulation No. 109 | Retreaded Tires for Commercial Vehicles.
This submission is related to the following document(s):
|
|
2022-11-25 |
2022-11-27 10:50:12 UTC |
2022 November 14 |
Rationale for ETRTO Abrasion Rate test layout | TA-06-05
|
2022-11-14 |
2022-11-14 14:22:37 UTC |