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Saturday, 31 October 2026
Week 44
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31 Oct 2026 | Tyre abrasion: Study of Sandpaper Surface Replacement | TA-53-08
(1 posted today) (34 posted during the past week)
Tyre abrasion: Study of Sandpaper Surface Replacement
Reference Number: TA-53-08

Study evaluating the validity of the current recommendation in Annex 3 Appendix 5 for sandpaper surface replacement interval based on running distance by examining test results exceeding 20,000 km. Testing nine consecutive runs on #80 grit sandpaper without replacement over 45,000 km total distance using new tyres for each run. Surface roughness measured by MPD and micro roughness showed no significant change and satisfied requirements in Paragraph 2.4.2.3. SRTT17S abrasion level remained above specification limits. Reproducibility of Abrasion Index was maintained when compared with Market Assessment results. Proposes extending replacement interval from 20,000 km to 30,000 km for 2-position drums and from 40,000 km to 60,000 km for 1-position drums.

Submitted by: JATMA
Meeting Sessions: 53rd TA session (29 Oct)
Document date: 31 Oct 26
Relevant to: UN Regulation No. 186 | Tyre abrasion
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Download from UNECE: .pdf format
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GRPE-TF-AVRS-22-06/Rev.1
GRPE AV Regulation Screening: Minutes of the 22nd (March 2025) session
Source(s)
Date
21 Mar 2025
Status
Subject
  • UN R49 Diesel/CNG/LNG Engine Emissions
  • UN R83 Motor Vehicle Emissions
  • UN R96 NRMM Emissions
  • UN R115 LPG/CNG Retrofit Systems
  • GTR No. 15 WLTP
  • UN R143 HD Dual Fuel Retrofit Systems
  • MR 3: VIAQ
  • GTR No. 21 EV Power Determination
  • GTR No. 22 EV Battery Durability
  • GTR No. 24 Brake Emissions
  • Regulation Screening for ADS
Meeting(s)
GRPE-TF-AVRS | Session 22 | 10 Mar 2025
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Working Party on Pollution and Energy (cf French: Groupe de Rapporteurs sur la Pollution et l’Energie)

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