wait just a cotton picking minute....I see a der. cable guide box on the down tube??? I thought these were electric only??? so I am mixed up...I want one that is mechanical capable...some i see are just solid down tube but this one and one other I see as having the portal on the down tube. for the der. cable.....so what is the truth to this??? Hoping I can get one just like this...except in a 52 rim brake version...cheers