ANNEX IGRADING OF TYRE PARAMETERS

Part A: Fuel efficiency classes

Annotations:
Amendments (Textual)

F1The fuel efficiency class must be determined on the basis of the rolling resistance coefficient (RRC) according to the ‘A’ to ‘G’ scale specified below and measured in accordance with Annex 6 of UNECE Regulation No 117 and its subsequent amendments and aligned according to the procedure laid down in Annex IVa.

If a tyre type is approved for more than one tyre class (e.g. C1 and C2), the grading scale used to determine the fuel efficiency class of this tyre type should be that which is applicable to the highest tyre class (e.g. C2, not C1).

C1 tyres

C2 tyres

C3 tyres

RRC in kg/t

Energy efficiency class

RRC in kg/t

Energy efficiency class

RRC in kg/t

Energy efficiency class

RRC ≤ 6,5

A

RRC ≤ 5,5

A

RRC ≤ 4,0

A

6,6 ≤ RRC ≤ 7,7

B

5,6 ≤ RRC ≤ 6,7

B

4,1 ≤ RRC ≤ 5,0

B

7,8 ≤ RRC ≤ 9,0

C

6,8 ≤ RRC ≤ 8,0

C

5,1 ≤ RRC ≤ 6,0

C

Empty

D

Empty

D

6,1 ≤ RRC ≤ 7,0

D

9,1 ≤ RRC ≤ 10,5

E

8,1 ≤ RRC ≤ 9,2

E

7,1 ≤ RRC ≤ 8,0

E

10,6 ≤ RRC ≤ 12,0

F

9,3 ≤ RRC ≤ 10,5

F

RRC ≥ 8,1

F

RRC ≥ 12,1

G

RRC ≥ 10,6

G

Empty

G