Pneumatici auto bridgestone estive 255/40 R21 T
255/40 R21 102Y XL 
B 
A 
7 dB
B
A
7 dB
255/40 R21 102Y XL
A
B 
6 dB
A
B
6 dB
DEMO DOT 2021
255/40 R21 102Y XL
C
A
70 dB
C
A
70 dB
255/40 R21 102T XL
A
A
6 dB
A
A
6 dB
255/40 R21 102Y XL
C
A
7 dB
C
A
7 dB
255/40 R21 102Y XL
A
B
6 dB
A
B
6 dB
255/40 R21 102Y XL
C
B
70 dB
C
B
70 dB