UN R117: Proposal for a Supplement to the 03 series of amendments
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Proposal from the Worn Tyres working group to improve precision of the test procedures for measuring the wet adhesion of tyres in a worn state by using a moulded SRTT16 reference tyre (instead of a buffed tyre), to introduce new transitional provisions related to this change, to extend corrections already made to thee 02 series to the 03 series and make additional editorial corrections, and to define the range for tyre inflation vis-à-vis rim size to reduce uncertainties in measuring tread depth.

Reference Number: GRBP/2022/22
Date: 16 June 2022
Proposal Status: Formal GR review
Related Documents:
WT-44-05/Rev.1 | UN R117: Draft text for informal document to amend document GRBP/2022/22