You know why, just look for the front shift lever.
I see what you mean but I've seen that on later tandems where front derailleur was cable operated and could have been installed at the back... I can check my AS book, I'm sure they are some like this.
Well actually a quick google search shows one from 1949 where derailleur could have been at the back, unless I miss something...
Dammit, another AS in anti-porn, I will crash with my bike for blasphemy...!
I see what you mean but I've seen that on later tandems where front derailleur was cable operated and could have been installed at the back... I can check my AS book, I'm sure they are some like this.
Well actually a quick google search shows one from 1949 where derailleur could have been at the back, unless I miss something...
Dammit, another AS in anti-porn, I will crash with my bike for blasphemy...!