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[Atom] [Brooks] [Campagnolo] [Dia-Compe and Weinmann] [Huret] [Maillard] [Normandy] [Nitto] [SR (Sakae)] [Sachs-Huret] [Shimano] [Strong] [Sansin] [Sunshine] [Sun Tour (Maeda)] [Sugino] [Tange] [Williams] [Dancing Chain] [Saddles]The date of manufacture of a bicycle's components can often be used to determine the date of manufacture of the bike itself.Some bike parts have a date code cast or stamped into the piece.The rear derailleur freewheel/cassette and chainwheels are probably the first to be changed on a bike.On a vintage bike in excellent condition (that apparently had a lonely existence in a garage) all of the components likely are original.For Treks, the SR date markings are especially important.

The components were added by the local bike shop or by the buyer. Components also could be swapped from an existing ride to the new frameset.Of course, all this assumes the bike has the original component.The most likely components to be original are the stem, handlebars, seatpost, and brakes.Even those equipped with Suntour Superbe components usually had SR seatposts.Many components are marked with size descriptors in addition to component manufacturer's date codes.