F1ANNEX IVaLaboratory alignment procedure for the measurement of rolling resistance

Annotations:

6.PROCEDURE FOR THE ALIGNMENT OF A CANDIDATE LABORATORY

One reference laboratory (l) of the network shall calculate the linear regression function of the candidate laboratory (c), A2c and B2c, as follows:

RRCm,l = A2c × RRCm,c + B2c

where:

RRCm,l

is the measured value of the rolling resistance coefficient by the reference laboratory (l) (including temperature and drum diameter corrections)

RRCm,c

is the measured value of the rolling resistance coefficient by the candidate laboratory (c) (including temperature and drum diameter corrections)

The aligned RRC of tyres tested by the candidate laboratory is calculated as follows:

RRC = (A1l × A2c) × RRCm,c + (A1l × B2c + B1l)