Campagnolo 1012/1, Gran Sport
Main Photo
Category:  Rear Derailleurs
Name:  Campagnolo 1012/1, Gran Sport
Brand:  Campagnolo
Primary Group:  Gran Sport
Model:  1012/1
Years:  1952
Country:  Italy
Weight:  300 grams
Added By: JFischer on 07/19/07
Updated By: JFischer on 12/05/10
Additional Photos - click for full size
Campagnolo 1012/1, Gran SportCampagnolo 1012/1, Gran SportCampagnolo 1012/1, Gran SportCampagnolo 1012/1, Gran SportCampagnolo 1012/1, Gran Sport
Outer Plate MarkingsCampagnolo Gran SportInner Plate MarkingsCatena 3/32 DA14 A26 Denti
MaterialBronzeDesign CategoryInline parallelogram
Attachment Bolt SizeClawCable Attachment Bolt Size8mm Wrench
Shifting SystemsFrictionCable AdjusterYes
Cage LengthShortMax Cog Size26
Max Chain Wrap  
General Information
Very early version of the Campagnolo Gran Sport rear derailleur.  Smooth (non-toothed) jockey wheels.  Note the drilled jockey wheels and the design of the upper (right side in photo) jockey cage.  There is an extra bar making two openings instead of the one seen in both earlier and later versions of the GS rear derailleur.
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Additional Resources
Resources:Reference & ChartsCatalogsExternal Resources
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 4)BrandGroup
Campagnolo 1012/1, Gran SportCampagnoloGran Sport
Campagnolo 1012/4, Gran SportCampagnoloGran Sport
Campagnolo 1012/4, Gran Sport (first version)CampagnoloGran Sport
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Gran Sport (1951-196X)Campagnolo1951 - , Road RaceView 26 Components
Details:  Hugo Koblet won the 1951 Tour de France in July using Gran Sport derailleurs.
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