TyreGTR informal group draft highlighting amendments, including provisions for LT/C tyres.

Proposal to reconcile UN R138 with UN R51 with regard to maximum sound pressure levels at speeds greater than 20 km/h by clarifying that the 75 dB(A) limit for AVAS under UN R138 concerns only the 0-20 km/h speed range.

Proposal for amendments to the draft Supplement 6 to the 03 series of amendments submitting clarifications to the text from the ASEP II informal group.

Proposal to align UN R51 with ISO 5130:2019 and thereby set requirements for the microphone position as a function of the exhaust outlet configuration.

Presentation on the status of the 2019 update to ISO 16254 (Acoustics – Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation – Engineering method). ISO 16254 specifies an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.

Table of GRBP regulatory priorities and timelines.

Latest changes from the TyreGTR informal group to the draft Amendment 2.

Report on discussions within the Group of Interested Experts on provisions for UN R117.

Proposal from the ASEP II informal group for clarifications to the Regulation.

Proposal from the group of interested experts to allow for the type approval of special-use tyres designed for severe snow conditions.

Proposal to transpose the modified requirements for non-original replacement exhaust silencing systems (NORESS) from UN R92 (Replacement exhaust silencing systems for motorcycles) into UN R59.

Proposal to align the provisions for retreaded tyres to be tested and marked with the three-peak-mountain snow-flake (3PMSF) symbol with the amendment proposals to UN R117 (document GRBP/2019/19).

Proposal to align the provisions for retreaded tyres to be tested and marked with the three-peak-mountain snow-flake (3PMSF) symbol with the amendment proposals to UN R117 (document GRBP/2019/19).

Proposal to:

1. include the load variation with speed for IF and VF tyres in Table A of Annex 7
introduce a new paragraph (2.18.13) and amend paragraph 3.1.9.and Annex 3,part D to reconcile contradictions
2. clarify Annex 6 “Test method for measuring tyre dimensions” via references to other provisions
3. Correct example in Annex 3, part C by introducing the dimension “b” for the tyre size designation, and
4. Modify inflation pressure markings.

Proposal for an amendment to complement the content of working document GRVA/2018/5. The proposal includes amendments to:

1. The Standard Reference Test Tyre (SRTT) denominations
2. Remove the discrimination between the two Class C3 tyres
3. Clarify that there are no C3 tyres in the scope of this UN Regulation “not marked with speed symbol”
4. Align Annex 6 with the most recent amendments made to standard ISO 28580
5. Define “standard deviation” as appropriate in the text
6. Clarify that, in the cases of C2 and C3 tyres, the “Reference (test) pressure” and the value “Pr” correspond to the indication of the inflation pressure which is always marked on the sidewall
7. Use “repeatability” in lieu of inaccurate “reproducibility”
8. Update test report forms
9. Include the date on which the new proposed supplement of UN Regulation No. 117 will apply
10. Improve the description of the evaluation of the rolling sound emission test
Correct the figure in Annex 2, Appendix 2, and
11. Update cross references pursuant to paragraph renumbering.

Proposal to correct inconsistencies on the exemption conditions for the additional sound emission provisions (ASEP) for vehicles with variable gear ratios or automatic transmission with non-lockable gear ratios.

Proposal to introduce mandatory additional sound emission provisions (ASEP) testing.

Proposal is to correct an omission regarding the compensating resevoir fill time thereby aligning UN R41 with the other noise UN Regulations Nos. 9, 51 and 63.

Proposal to allow multiple exhaust and/or silencing system configurations to be explicitly listed under the same motorcycle type approval in order to reduce redundancy and number of separate approvals and documentation.

Proposal to minimize proliferation of approval numbers from models with differences in vehicle exhaust and silencing systems.

Proposal to define “electronic” as a “principle of operation by electric or electro-magnetic force with amplifier and speaker or resonator”.