Qual'è la differenza tra il cambio posteriore ultegra
RD6700
RD6700 A
?
http://techdocs.shimano.com/media/t...RD/EV-RD-6700-2919A_v1_m56577569830753764.pdf
http://techdocs.shimano.com/media/t...D/EV-RD-6700-A-3309_v1_m56577569830799991.pdf
RD6700
RD6700 A
?
http://techdocs.shimano.com/media/t...RD/EV-RD-6700-2919A_v1_m56577569830753764.pdf
http://techdocs.shimano.com/media/t...D/EV-RD-6700-A-3309_v1_m56577569830799991.pdf