The date is on the back side of the arm near the spider of the crank, typically of the form of the two-digit year above a letter, apparently representing the month. Some were made from all Reynolds tubing. Other manufacturers of bicycle components have date marks on their pieces. Components also could be swapped from an existing ride to the new frameset. You should be able to see it by peeling back the hood from the handlebar end.
Following Ben's lead - I checked three sets of Dia-Compe G calipers and all have the four-digit date code on the back of one of the arms. The following information was provided by Tony Colegrave, Brooks expert, saddle repairman, and custom leather saddle fabricator. These dates are not necessarily the same as the model year of the frame. The dates coded in the serial numbers, or the dates inferred from the numbers, connect cannot are dates on which the new frames were stamped with serial numbers serialized.
Now you can easily read the number. Any other ideas for these last three characters? The rest of the code defines time to a month. Their work must not be stolen.
Sean Hickey suggested the first numeral is the year of manufacture, portland oregon dating site and the letter is the month of the year A - L. On some models there may also be another date code on back of lever's tip. It is easy to confuse the date code with the alphanumeric model number e.
One letter is the month, the other is the year. The components were added by the local bike shop or by the buyer. The series frames and forks were built entirely in Waterloo.
- Each seven-character number consists of three letters mixed with numerals.
- If you have a stem with a code, and know the year of the bike on which it came or the date it was bought, please let me know.
- These frames may be related to the M and N leading serial number bikes in the section above.
If there are two letters after the year numeral, the first is the month. Nearly two hundred Trek owners submitted their frame's specifics to help decode Trek's first serial number system. The Normandy Luxe Competition hubs we have seen have no stamped information, but were marked with gold or red stickers on their barrels. An arrow points to the month the product was made. These frames often were not serialized.
Seems hundreds didn't get any numbers at all. The second two numbers are the year of manufacture e. The second runs from A through at least Y. In this website, we credit the people involved in the understanding of these codes. We are trying to sort out the manufacturer's date code on Nitto handlebars and stems.
- The year digit is the fourth character in the number.
- Serial Number Decoding Project Nearly two hundred Trek owners submitted their frame's specifics to help decode Trek's first serial number system.
- For each component model, it gives the years in which that model was sold.
The first letter represents the year and the second is the month, where A is January and L is December. However, finding the code may be hard on the saddle. Unfortunately, these hubs apparently have no date codes. Tange forks have a date code on the steerer tube. The first two digits are the week of the year.
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This code was used on Mighty Comp models. Trek Kevin Tita graciously provided a copy of the journal for this web site. On rear derailleurs the code is stamped on the back side of the inner parallel arm.
Giro Rosa - stage 3 Watch replay
It appears near the insertion mark. Many early Trek bottom bracket shells have a one or two letter code stamped separately from the serial number. Sales persons sometimes had difficulty reading the numbers.
The record of the assembly runs was documented in a handwritten journal. This form was used first in to differentiate it from the s code. Seatposts are marked with outside diameter, also in mm.
Preliminary data indicate this code began in the late seventies and extended at least through the late eighties. Maillard Hubs and Pedals Maillard used an open dating system for their hubs and pedals. There also may be a cast-in code of a number and perhaps two letters. Perhaps it was just left blank? This code was used on hubs that were stamped incised with information on their barrels.
Giro Rosa stage 3 Watch replay
Others have reported the same. What leading letter to use? The date codes each covered a period of three months i. Naturally, for information provided by others, such as for the Campagnolo and Williams codes, the original source should be cited. If you have confirmation of the date codes, or corrections or additions to the codes, please contact me.
Used Trek Bicycles
This makes dating the components an interesting archeological investigation, but one not necessarily related to the date of the bike. The subcontractors may have used their own dating systems, as changing to a standardized Sugino system would add extra cost and perhaps confusion at the subcontractor's plant. Some, if not all, Sachs-Huret derailleurs have an open dating system stamped on the back of the derailleur. In the early years Trek allowed, and even encouraged, their workers to use company equipment and materials to build personal frames after hours. Feel free to quote small parts of the information on this page, but copyright law requires Vintage-Trek.
In this case I used a red candle to make the serial number stand out. These could be the in-between years of transition between the Showa and Western calendar. Is it a result of Sugino subcontracting out the manufacture of some crank models at various times? The information in the table is from serial numbers submitted by site visitors.
Sale and clearance
These three serial number forms may mean that Trek used at least three subcontractors for the Jazz line. These frames, or complete bikes, apparently were made in Japan by an outside contractor. Trek owner Larry Osborn made this observation, and suggested this as a supplementary way of dating a Trek and other bikes as well. It is likely this was made by the same manufacturer as the bikes described in the paragraph below. This would appear to be an open date of - January.
Used Trek Bicycles for Sale
However, a Gran Compe set of calipers had no markings. The number is under the plastic cable guide attached to the bottom of the bottom bracket shell. The number is the year of manufacture and the letter appears to be the month of manufacture. Why does Sugino have so many codes? The first letter represents the year.
The date of manufacture of a bicycle's components can often be used to determine the date of manufacture of the bike itself. Serial Number Decoding Project. When a Trek frame was repainted by Trek, an additional set of numerals was often stamped into the bottom bracket to indicate the frame was repainted.
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. The date code is stamped or cast? This seems to mesh with the derailleur codes above. On a vintage bike in excellent condition that apparently had a lonely existence in a garage all of the components likely are original. Maillard used an open dating system for their hubs and pedals.