Bk-group sprocket teeth combination: 11-13-15-17-19-21-24-28-32-36T
Bk-group sprocket teeth combination: 11-13-15-17-19-21-24-28-32-36T
Bk-group sprocket teeth combination: 11-13-15-17-19-21-24-28-32-36T
Bk-group sprocket teeth combination: 11-13-15-17-19-21-24-28-32-36T