UN R64 Supplement 1 (03 series) · UNECE Regulation No. 64 (ECE R64) — Uniform provisions concerning the approval of vehicles with regard to their equipment which may include: a temporary use spare unit, run flat tyres and/or a run flat system and/or extended mobility tyres.
UN R64 — Supplement 1 to the 03 series of amendments
Base text → Supplement 1
- What changed
- New paragraph 2.4.5. defines an “Extended Mobility Tyre”. Paragraph 1. now also covers vehicles of category M1 and N1 when equipped with extended mobility tyres.
- In paragraph 5.1.6., vehicles equipped with extended mobility tyres must now also be fitted with a Run-Flat Warning System. The Run-Flat Warning System is not required if the vehicle is fitted with a Tyre Pressure Monitoring System meeting UN Regulation No. 141.
- In Annex 3, an extended mobility tyre must be tested in the fully deflated condition.
- Why
- The amendments are intended to take into account and implement the changes proposed to UN Regulation No. 30 in ECE/TRANS/WP.29/GRVA/2018/6.
- ECE/TRANS/WP.29/GRVA/2018/6 presents amendments for the introduction of “Extended Mobility Tyre” as a new definition in UN Regulation No. 30.
Q1What changed10 changes
New definition of “Extended Mobility Tyre” (para. 2.4.5.)
New paragraph 2.4.5. defines an “Extended Mobility Tyre” as a pneumatic radial tyre designed to operate in an inflated mode. The tyre is mounted on the appropriate wheel, in the absence of any supplementary component. It can then provide the vehicle with the basic tyre functions in flat tyre running mode. This applies at a speed of 80 km/h (50 mph) and a distance of 80 km.
Scope: vehicles equipped with extended mobility tyres (para. 1.)
This Regulation now also applies to the approval of vehicles of category M1 and N1 when equipped with extended mobility tyres (new item (c)). Spare wheel and tyre substitute units in the form of extended mobility tyres in a totally deflated condition are now treated as temporary-use spare units.
Type 5 temporary-use spare unit (para. 2.10.5.)
Type 5 is an assembly in which a wheel and tyre unit is fitted to the vehicle for normal, long term road use. It is used in an emergency in a totally deflated condition. The wheel and tyre unit can now also be one as defined in paragraph 2.4.5.
Spare unit supply and Run-Flat Warning System (paras. 5.1.5. and 5.1.6.)
Under paragraph 5.1.5., it is permitted to supply only one temporary-use spare unit with the vehicle, except in the cases it names. Extended mobility tyres are now one of these cases. In paragraph 5.1.6., vehicles equipped with extended mobility tyres must now also be fitted with a Run-Flat Warning System (defined in paragraph 2.13.). The system must be capable of operating within a speed range from 40 km/h to the maximum design speed of the vehicle. It must meet the requirements of paragraphs 5.1.6.1. to 5.1.6.6. It is not required if the vehicle is fitted with a Tyre Pressure Monitoring System meeting UN Regulation No. 141.
Annex 1 and test conditions in Annex 3 (para. 1.5.)
In Annex 1, the introductory part and item 9.3. now also name extended mobility tyres. In Annex 3, paragraph 1.5., an extended mobility tyre must be tested in the fully deflated condition, like a run-flat tyre. Other tyres must be inflated to the pressures recommended by the vehicle manufacturer for the vehicle type and loading condition.
Q2Why it changed
- Proposed by
- Experts from the European Tyre and Rim Technical Organisation
- Working party
- GRB, 69th session (January 2019)
Reasons
The amendments are intended to take into account and implement the changes proposed to UN Regulation No. 30 in ECE/TRANS/WP.29/GRVA/2018/6.
Source
“The proposed amendments are intended to properly take into account and implement the changes proposed to UN Regulation No. 30 as per ECE/TRANS/WP.29/GRVA/2018/6.”
ECE/TRANS/WP.29/GRVA/2018/6 presents amendments for the introduction of “Extended Mobility Tyre” as a new definition in UN Regulation No. 30. The definition is based on a new “minimum requirement” performance test procedure.
Source
“This document presents amendments corresponding to the introduction of "Extended Mobility Tyre" as a new definition in UN Regulation No. 30, based on a new "minimum requirement" performance test procedure”
Document trail
- 2018-07ProposalECE/TRANS/WP.29/GRVA/2018/7Proposal by the experts from the European Tyre and Rim Technical Organisation
- —Working party adoptsECE/TRANS/WP.29/GRB/67GRB session report, para. 17: GRB adopted the proposals for UN Regulations Nos. 30 and 64
- 2019-04Sent to WP.29ECE/TRANS/WP.29/2019/52Text that GRB adopted and sent to WP.29 and AC.1
- 2019-06WP.29 adoptsECE/TRANS/WP.29/1147Adopted at the 178th session (session report, para. 134)
- 2020-01-11In forceC.N.12.2020.TREATIES-XI.B.16.64UN depositary notification
Q3Who is affected
Vehicle manufacturer
- For vehicles with extended mobility tyres, make sure that paragraph 5.1.6. on the Run-Flat Warning System is met.
Component supplier
- Make sure that tyres you supply as extended mobility tyres meet the definition in paragraph 2.4.5.
Technical service / Approval authority
- In the braking and deviation test of Annex 3, test an extended mobility tyre in the fully deflated condition.
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ⓘ This report gives advice only. It is not legal or type-approval advice.