Mi scuso per il ritardo nel rispondervi. Dopo verifica con i colleghi dell'ufficio tecnico vi confermiamo che per la sostituzione della catena sono necessari due perni
I apologize for the delay in answering you. After checking with colleagues of the technical office will confirm that to change the chain requires two pins
I apologize for the delay in reply to it. after checking with colleagues of the technical office we can confirm to you that for the replacement of the chain are needed two pins