Trek Frame Serial Numbers
Prior to Late 1980 | Late 1980 to Late 1986 | Late 1986 to 1999+
Foreign Built After 82 | Jazz by Trek | Missing Serial Numbers
Serial Number Location
Trek frame serial numbers (SNs) are typically stamped into the bottom of the bottom bracket shell. In the case of some early 80s Treks, the number is under the plastic cable guide on the bottom of the shell. Just remove the plastic cable guide to see the number. The other place Trek (or their subcontractors) stamped the SN is at the lower end of the seat tube.
Skyway 26' T/A XL Frame and Fork set. Available in WHITE. PlanetBMX and Skyway are once again teaming together to bring you one of the most beautiful, and best-riding cruisers ever made! With great retro styling, and modern sizing and geometry, this frameset is an instant classic! Here are the specs: 4130 Cr-Mo aerodynamic tear-drop shape tubing. What is the phone number for the Skyline Corporate headquarters? The toll free number for our Corporate offices in Elkhart, IN is 1-800-348-7469. The mailing address is Skyline Corporation P.O. Box 743 Elkhart, IN. Does Skyline sell garages? Skyline manufactures homes which are then sold through independent dealers. Yy indicates two numeric characters designating the last two digits of the year (i.e. 81 = 1981, 82= 1082, etc.) xxxx indicates a numeric characters designating the sequential frame number within a the fortnight, month or year. This number string is typically four to six characters in length but can vary. AMERICAN EAGLE (USA): see Kawamura.
Note: The SN on your original sales receipt may not match the one on your bike. Sales persons sometimes had difficulty reading the numbers.
Many early Trek bottom bracket shells have a one or two letter code stamped separately from the serial number. This was made by the individual framebuilder to mark his/her work. On some bottom brackets there are two codes: one indicating the maker of the main triangle and the other for the maker of the rear triangle or perhaps the person who cut and shaped the tubing, if not done by the framebuilder. If you know which mark was used by a particular craftsman, please let me know.
Serialization Date
The dates coded in the serial numbers, or the dates inferred from the numbers, are dates on which the new frames were stamped with serial numbers (serialized). These dates are not necessarily the same as the model year of the frame. At some time late in each year (beginning generally September or October) the frames produced were created from designs, and painted with colors, for the next year.
Hard to read?
Trek serial numbers can be hard to read. Clean the area well, and use lots of light at various angles. A suggestion by J. Hansen can help you read a serial number:
Serial Number highlighted with red wax. Click on image to see an enlarged version. (Photo by J. Hansen) |
'Rub the area with candle wax of a color that contrasts with your paint. Lightly wipe it off with a rag. The wax stays in the indented area of the S/N. Now you can easily read the number. I have included a photo of the results from my bike. In this case I used a red candle to make the serial number stand out. Note that even with the serial number filled with wax, the leading '0' is almost imperceptible.'
Serial Number Descriptions
The serial number descriptions are divided into five categories. Click on the link below to go to the appropriate category.
Prior to Late 1980 | Late 1980 to Late 1986 | Late 1986 to 1999+
Foreign Built After 84 | Jazz by Trek | Missing Serial Numbers
PRIOR TO LATE 1980
Before late 1980, Trek used an alphanumeric serial number scheme. Each seven-character number consists of three letters mixed with numerals. The serial number list and the code for the list are not available from Trek (but hope springs eternal). In the meantime, we have the results of the serial number decoding project:
Serial Number Decoding Project Nearly two hundred Trek owners submitted their frame's specifics to help decode Trek's first serial number system. Our thanks to these generous cyclists. Trek used this system from 1976 to late 1980. A variant of this first system was used in 81 and perhaps 82 for some frames. See **** year exceptions below. These serial numbers have seven characters, in the form L N L N L N N, where L is a letter and N is a number. Here are the results: The first letter is the model designation. The letter code indicates frame model, which would include bike models made from that model of frame.
The first number is the frame size, where
The second letter represents the month the frame was serialized:
The second number is the last digit of the year, 6, 7, 8, 9 (for 197X) and 0 for 1980. See note below,****, for year exceptions. Again, this is the date of serializing, not necessarily model year. The last three characters - The final letter ranges from A to Z and the final two numbers go from 01 to 99. The last letter might be a run designation, with the last two numerals the frame number in that run? Alternatively, the letter extends the range of the character from 0 to 9 (if a number) to 1 to 26. This gives a range of 2600 for the 3 characters. Any other ideas for these last three characters? The rest of the code defines time to a month. Perhaps once Trek was nearing more than 2600 bikes/frames of a given model per month, a new serial number scheme needed to be developed. Hence the change to the sequential system that was started in late 1980. Notes:
****Year Exceptions:
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. These numbers were usually four digits, in the form NNNN. |
LATE 1980 TO LATE 1986
Late in 1980, Trek changed to a new numbering system for their frames built in the U.S. The frames were numbered sequentially, beginning with number 000001. The record of the assembly runs was documented in a handwritten journal. Trek (Kevin Tita) graciously provided a copy of the journal for this web site. The list ended in November of 1986 with number 279975. This serial number system actually extended through at least 1997 (see Table II below).
The journal includes run number, model number, frame size, and serial number range. Incidental information, including dates and comments on the frames, appears sporadically through the journal. A 'run' was for a particular frame size and frame model.
We all owe thanks to Luker White who generously donated his time to convert much of the paper list to digital form.
These data were mined to produce bike production by model for each calendar year. The results can be seen on the Trek Bike Production by Model, Late 1980 through 1986 page.
Click on the date link in Table I below to go to the detailed serial number information for that year.
Table I - 1980 to 1986
Beginning Serial Number |
Notes for Table I:
This 6 digit (7 digit beginning in 1993) code extended into at least 1999, at least for some models (generally mid to upper level and made in the US). The number may or may not have a leading zero, making the six digits into seven digits prior to 1993. The model is not available for these numbers but the year can be determined or estimated from Table II below. The information in the table is from serial numbers submitted by site visitors. Our thanks to them. In contrast to the serial number dates in Table I above, the years in Table II represent model years, not the date the serial number was applied.
Table II - Model Years 1987 to 1999
Serial Numbers Include |
270821, 284237, 284335, 293788, 301294, 304445, 304940, 307880, 308292 |
309634, 316981, 319336, 335133, 346451, 347944, 356837, 360384, 364072 |
369203, 379079, 391236, 406793, 427402, 438108, 455267 |
458184, 513747, 532881, 563678 |
579529, 629426, 653761, 669753, 740528, 79xxxx |
771408?, 811550, 819194, 840762, 873805, 883719, 900224 |
971670, 1027164, 1035688, 108?734, 1106529, 1109196, 1116394, 1125523, 1125738 |
1164917, 1269067, 1287883, 1306226 |
1331934, 1383671, 1406630, 1431480, 1439467, 1506862 |
1544446, 1649278, 1878372, 1955570 |
1876296?, 1963294, 2008374, 2063546 |
2090413, 2140321, 2172336, 2195013 |
2290083 |
FOREIGN-BUILT FRAMES AND BIKES AFTER 1982
Three different serial number forms have been submitted for 1983 Trek Model 400 frames. One, marked 'made in Japan', begin with JS followed by six numerals. The SN was located on the bottom of the bottom bracket. A second serial number is 81765. According to the Trek-provided SN list, this corresponds to a 22' (22.5') Model 400 frame made in 1983. This SN form is for frames/bikes made in the US The number was marked on the bottom of the bottom bracket. The third number is 403300950, which indicates foreign built, but the nation of origin sticker was missing. This number was marked at the bottom of the down tube. It is likely this 400 was made by the same manufacturer as the 1984 bikes described in the paragraph below. For the 1983 Model 400, it appears Trek used three sources for their frames or complete bikes.
Several 1984 Trek 460s, 420s and 400s have been reported with 9 digit numeric serial numbers stamped on the lower seat tube instead of on the bottom of the bottom bracket. These frames, or complete bikes, apparently were made in Japan by an outside contractor. The numbers submitted are in the range of 401000000 to 440000000.
An 8 or 9 character alphanumeric code was used for mid- and low-level frames subcontracted in Taiwan. Most of these bikes were labeled 'Made in Taiwan' (although the sticker often is easily removed). This form of serial number appears to have been used during the period 1987 to 93. The number leads with a T (for Trek?) then a numeral, one letter or two, then five (sometimes 4) numerals. Sean Hickey suggested the first numeral is the year of manufacture, and the letter is the month of the year (A - L). This is confirmed by serial numbers that were submitted by other Trek owners. If there are two letters after the year numeral, the first is the month. The second runs from A through at least Y. It might be a way of extending the 5 digit number series by a factor of 26.
A later 8 and then 9 character alphanumeric SN scheme, used beginning in about 1989, also begins with a T (for Trek?). These later T numbers were used on lower level subcontracted frames but do not follow the 2nd and 3rd or 3rd and 4th character date meanings above.
Beginning in about 1993 (model year 94), an 8 character alphanumeric code was used for some bikes. It begins with G and another letter (e.g. GN, GQ, GR, GS, GU, GV, GW, GY and GZ). These are followed either by: 6 numerals, or a numeral and a letter followed by four numerals. The first numeral in the SN may be the year of serialization.
JAZZ BY TREK
Jazz is a line of foreign-built, entry-level bicycles that Trek sold in the early 90s. (See the history page for a bit more info and the brochures page for a 93 catalog). There seems to be at least three serial number types:
These three serial number forms may mean that Trek used at least three subcontractors for the Jazz line.
A few owners of early Treks, mostly, from 1976 through the early 80s, report their frames are not marked with serial numbers. A past Trek employee wrote that the police in the Madison and the surrounding area said TREK was famous for bikes with no serial numbers. Seems hundreds didn't get any numbers at all. The serial number guy just missed a few?
Three other possibilities: 1. In the early years Trek allowed, and even encouraged, their workers to use company equipment and materials to build personal frames after hours. These frames often were not serialized. The practice stopped after production was increased, resulting in little available down time for the equipment. 2. The serial number on a repainted frame that was not first stripped, may disappear under the new paint. 3. The number is under the plastic cable guide attached to the bottom of the bottom bracket shell.
Prior to Late 1980 | Late 1980 to Late 1986 | Late 1986 to 1999+
Foreign Built After 82 | Jazz by Trek | Missing Serial Numbers
Brochures | Price Lists and Values | Trek History | Trek Timeline | Serial Numbers
Component Dates | Gallery | Contact | Buy/Sell Suggestions
Refurbish/Upgrade | Bike Resources | Home
*Trek is a trademark of Trek Bicycle Corporation, Waterloo, WI
All copyrights in the TREK brochures, pricelists, owner's manuals and photographs displayed on this website are the sole property of Trek Bicycle Corporation, Waterloo, Wisconsin.
All materials in this site not copyrighted by others are Copyright © 2001-2015 Skip Echert Web Associates, All rights reserved.
We do NOT sell GUNS.
We do NOT sell PARTS.
We do NOT offer GUN VALUES.
We do not represent any gun
makers or sellers.
Shopping Cart:
SERIAL NUMBERS OFTEN ALLOW YOU TO DETERMINE YEAR OF MANUFACTURE
Knowing the year your vintage firearm was made makes it easier to decide which gun catalog we sell will give you the best information about the company, models made and more. To help you determine the year made, find your serial number and then select a link from those below to sites that offer serial dates.
The Blue Book of Used Gun Values offers serial numbers for the following makers:
AYA, Boss & Co., Ltd, Browning, EJ Churchill, Colt, Colt Black Powder 2nd Gen, John Dickson & Son, AH Fox, German early Date Codes, German Modern Date Codes, Stephen Grant, WW Greener, Harrington & Richardson, High Standard, Holland & Holland, Italian Year of Mfg. Date Codes, Ithaca Gun Co., Charles Lancaster, Joseph Lang, Marlin Firearms, Mauser Broomhandles, Parker Brothers Shotguns, Piotti, James Purdey, Remington Date Code & SxS Shotguns, Savage/Stevens, LC Smith, Smith & Wesson, Spanish Year of Mfg. Date Codes, Sturm, Ruger & Co., Winchester Rifles, Winchester Rifle & Shotgun 1969+, Winchester Shotguns.
Other websites that may help (Information from websites other than the manufacturer website should be examined with some skepticism):