28. The experts of the Task Force on Tyre Abrasion (TF TA) reported on their activities (GRBP-78-26) and presented two draft methods for measuring tyre abrasion: a real on-road driving method (GRBP-78-17) and an indoor drum method (GRBP-78-18). GRBP invited all experts to study both methods and provide comments to TF TA not later than 21 September 2023.

29. The experts from Finland, Norway and Sweden expressed concerns that ice tyres were not covered by the proposed test methods. The expert from TF TA replied that they either would need to be excluded from the scope or that a separate test procedure should be developed for them. The expert from ETRTO pointed out a tiny market share of ice tyres and felt that it would not be feasible to test abrasion of these tyres on icy roads.

30. The expert from OICA introduced preliminary results of their tyre abrasion study (GRBP-78-32). GRBP took note of this information and look forward to receiving the final results at the next session.