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Swaps can take place early in the life of a bike as the proud new owner upgrades to new or used components of higher quality.Components can, and will, offer easy to find accurate and inaccurate vintage determining clues, and our Benotto example is no exception to the rule., which has downloadable PDFs of most of the classic-period (pre-1985, basically) catalogs.They also have a message board with a lot of savvy people; they managed to talk me through rebuilding a C-Record era Chorus rear derailleur.In other words, if a front derailleur design was offered for ten years, then that would be less than useful at pinpointing the components vintage.This would suggest that every component, fitted to the bicycle, must be examined, researched and then considered for its value in determining actual overall vintage of the bicycle, itself. Though, indirectly, this information can be used for vintage determining purposes, the window defined is close to useless.The most likely components to be original are the stem, handlebars, seatpost, and brakes.The rear derailleur freewheel/cassette and chainwheels are probably the first to be changed on a bike.

Not only can they deal with any problem you may have, but they also interface directly with our company.165=mm and pista=track obviously but what is that last number? Velo-Retro has a timeline of Campagnolo date codes for rear derailleurs, hub locknuts and crankarms.The general crankarm formula is: diamond='70s, circle='80s, square=late '80s/'90s.At least it would be the earliest date that the bike could have been made.Of course, all this assumes the bike has the original component.This suggests that there is at least one inherent danger, when relying on components to determine a bicycle's vintage.

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