Pneumatici auto firestone estive 225/55 R17 T
225/55 R17 101W XL 
B 
A 
7 dB
B
A
7 dB
225/55 R17 101W XL
C
A
72 dB
C
A
72 dB
225/55 R17 109H
B
B
7 dB
B
B
7 dB
225/55 R17 109T
C
B
73 dB
C
B
73 dB