ANNEX I

The 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 UNECE Regulation No 117 and its subsequent amendments. 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 The wet grip class of C1 tyres must be determined on the basis of the wet grip index (G) according to the ‘A’ to ‘G’ scale specified below and measured in accordance with UNECE Regulation No 117 and its subsequent amendments. G | Wet grip class 1,55 ≤ G | A 1,40 ≤ G ≤ 1,54 | B 1,25 ≤ G ≤ 1,39 | C Empty | D 1,10 ≤ G ≤ 1,24 | E G ≤ 1,09 | F Empty | G The external rolling noise measured value (N) must be declared in decibels and calculated in accordance with UNECE Regulation No 117 and its subsequent amendments. The external rolling noise class must be determined on the basis of the limit values (LV) set out in Part C of Annex II of Regulation (EC) No 661/2009 as follows. N in dB | External rolling noise class N ≤ LV – 3 | LV – 3 < N ≤ LV | N > LV |

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Source: EUR-Lex (Cellar) · retrieved 2026-11-06 · Text as adopted (Official Journal); later amendments are not incorporated in this text.