Schwinn Serial Numbers and Date Codes. Dates between 1948 and 1958 are available because Schwinn kept good records. From 1958 on, several different coding systems were used, from which the manufacture date (and often the assembly date) can be decifered. All serial number records before 8/18/1948 were lost in a factory fire. ![]() Can someone please explain what these three numbers mean on the pedal crank housing? I believe this to be the pedal crank housing from a 1956 Spitfire Ladies Bike. The Schwinn Serial reads M0D502 (hard to see but top left) The next number reads 46772 (medium right) The large number reads 13 5 124 One of my concerns is this. The Schwinn serial numbers that date the bike to the fall of 1954 or 1956, but I believe the Serial numbers for 54 and the 56 were located on the Left Rear Dropout - not located on the bottom bracket of the pedal crank housing. Why would this be? Additionally what does the 46772 indicate? And what does the 13 5 124 indicate? Thank you so much for all of your help! Date of Manufacture for Bicycle Components [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] 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. This clearly is when the component was made and not when the bike was made, but unless the component or bike manufacturer had lots of stock lying around in inventory, the date should be a fairly good indication of the year of the bike. 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. 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. On a vintage bike in excellent condition (that apparently had a lonely existence in a garage) all of the components likely are original. As the wear on a vintage bike increases, the greater the likelihood components are not original, either through replacement of worn parts or through component swaps. 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. Swaps also can be made as the bike falls out of favor, or is being sold, where the higher quality components are traded for lower quality ones that the owner had onhand. (Don't all cyclists have boxes and boxes of old components in their garage?) Most early Treks (1976 through about 1980) were sold as framesets. The components were added by the local bike shop or by the buyer. New components often were used. Components also could be swapped from an existing ride to the new frameset. This makes dating the components an interesting archeological investigation, but one not necessarily related to the date of the bike. A date code is marked on most or all SR seatposts. Many drivers got their first experience with a navigation unit through popular portable devices from makers like Garmin, Tom Tom or Magellan. Honda odyssey navigation update. These units almost always come with a “maps for life” feature that lets their owners connect online and download updates any time they want, for free. But often the love affair between factory nav systems and their owners hits a major detour when it comes time to update them. Trek owner Larry Osborn made this observation, and suggested this as a supplementary way of dating a Trek (and other bikes as well). Fueled by this first realization, and with the help of other bike folks, Larry and I have sorted out other codes (a project still ongoing). Especially useful, and challenging to sort out and verify, was the Shimano code. Also gathered on this page are date codes decoded and generously provided by others. For Treks, the SR date markings are especially important. Virtually all of the Treks not equipped with Campagnolo or Shimano Dura-Ace components, started life with some grade of SR seatpost and may also have SR stems, bars or cranks. 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. For example, the back of cranks are usually marked with crank arm length in mm, typically in the range of 165 to 185. Seatposts are marked with outside diameter, also in mm. For old Treks, 27.2 is the most common, but for other bikes the diameters can range from 25mm to 33mm. Derailleur Dates in 'The Dancing Chain' The rear derailleur can often be dated to a year or two by referring to the book 'The Dancing Chain - History and Development of the Derailleur Bicycle', by Frank Berto, 3rd edition 2009. The Appendix gives dates of initial manufacture for the vast majority of derailleurs made from 1920 to 1999. Request for Information This component dating discussion is a work in progress. If you have confirmation of the date codes, or corrections or additions to the codes, please. Other manufacturers of bicycle components have date marks on their pieces. Unfortunately, many of these are coded, and require some additional knowledge to understand the code. If you know of other components that are marked or coded that can be added to this list, please let me know. A NOTE ABOUT ATTRIBUTION: The information on this page is copyrighted. Feel free to quote small parts of the information on this page, but copyright law requires Vintage-Trek.com be listed as the source of the information. • Support everything in OpenSSH, agent forwarding, certificates, proxy jump, etc. Is a PuTTY alike tool with lots of extra features: • Full-featured terminal, supports 24bit true color. Gui scp for mac.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |