UN R117: Proposal for Supplement 12 to the 02 series of amendments
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Proposal to adapt the rolling-sound measurement procedures to accommodate special C2 tyres presenting a section width wider than 200 mm, aspect ratio lower than 55, rim diameter code lower than 15 and without any dual fitting indication (i.e. the front size 175/75R15 LT and the rear size 235/50R14 LT or the front size 175/75R15 LT and the rear size 265/50R14 LT).

Reference Number: WP.29/2020/75
Date: 31 March 2020
Meeting(s):
WP.29-181
Proposal Status: Formal WP.29 review
Related Documents:
GRBP-71-29 | UN R117 : Proposal to amend the Supplement to the 02 series of amendments
GRBP/2020/6 | UN R117: Proposal for a Supplement to the 02 series of amendments