Text prepared by the Russian Federation to elaborate on the concept of tyre deceleration (dω/dt) in the test technology.

Text prepared by the European Tyre and Rim Technical Organisation (ETRTO) in order to correct inconsistencies in time measurement accuracy in annex 6.

Further background as requested at the last GRB meeting on the recommended use of a “deceleration calculator” software for the deceleration test method in the test procedure for measuring rolling resistance.

Proposal to revise the European Tyre and Rim Technical Organisation (ETRTO) proposals (documents GRB-58-02 and GRRF/2013/30) to correct inconsistencies in time measurement accuracy in annex 6 of the regulation.