BONANZA PROFESSIONAL - Switzerland 1974 - road bike

list number 391
frame number 6653 on left seat tube
frame/fork Colner (?), Columbus
crank/sprocket/chain Ofmega gold 55/42t/Shimano 5-speed freewheel/?
derailleur (rear/front) Crane/Dura Ace
wheels (hub/rim/tire) Dura Ace 35h LF/Mavic Record du Monde de l'Heure 700/Hutchinson Supersprint tubulars
brakes/levers Dura Ace/Dura Ace
bar/stem 3ttt Mod. Grand Prix 38cm c-c/3ttt 90mm c-c
saddle/post Arius Special/SR Custom 27.2
paint/chrome/decals royal blue/front lugs, fork crown, stay and fork ends/Bonanza
plus Interview with Bonanza founder Eric Grieshaber
   
geometry seat tube 54cm c-c (55.5cm c-t), top tube 55cm c-c, weight 10.1kg
rating 2-3
   

 

bonanza_1974