Proposal for amendments to document GRRF/2017/5
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Revised version of the proposal to include UN R106 tyre dimensions in a Mutual Resolution on tyre sizes. The amendment to the table listing the allowed nominal rim diameters (d) is needed to allow the approval of standardized sizes which exist and are already on the waiting list for type approval.

Reference Number: GRRF-83-11
Origin: ETRTO
Date: 23 January 2017
Proposal Status: Informal GR review
Related Documents:
GRRF/2017/5 | Proposal for amendments to Regulation No. 106
Working Party on Brakes and Running Gear | Session 83 | 23-27 Jan 2017

36. The expert from ETRTO introduced ECE/TRANS/WP.29/GRRF/2017/5 and ECE/TRANS/WP.29/GRRF/2017/6 as amended by GRRF-83-11 and GRRF-83-12, proposing to introduce new tyres size usually listed in Annex 5 in a new Resolution, aimed at simplifying the update of this annex as well as reducing the number of amendments. GRRF noted that Annex 5 was containing non-metric tyre sizes not in line with the general formulae contained in the Regulation; therefore, GRRF wondered whether the right approach would be to introduce the appropriate formulae in the Regulation instead of continuously updating Annex 5. The expert from ETRTO agreed to address this proposal and to submit, if suitable, revised proposals for consideration at the next session.