1. Merida Bike Serial Number

Serial Number Criteria: Description Criteria: B-17G Data last updated: Tue Mar 15 09: 41-24440. 41-24489 Boeing B-17F-10. The most complete and FREE check that you can do when buying a used bicycle. Data supplied by police, insurers and property registers.

Centurion was a brand of bicycles created in 1969 by Mitchell (Mitch) M. Weiner and Junya (Cozy) Yamakoshi,^[1] who co-founded Western States Import Co. (WSI) in Canoga Park, California (initially Wil-Go Imports) to design, specify, distribute and market the bicycles. The bikes themselves were manufactured initially in Japan by companies including H. Tano Company of Kobe and later in Taiwan by companies including Merida. The Centurion brand was consolidated with WSI's mountain bike brand Diamond Back in 1990. WSI ceased operations in 2000.

Centurion and WSI competed in the U.S. against domestic and European bicycle manufacturers including Schwinn, Raleigh, Peugeot, Gitane and Motobecane — as well as other nascent Japanese bicycle brands including Miyata, Fuji, Bridgestone, Panasonic, Univega, Lotus and Nishiki — itself a line of Japanese-manufactured bicycles that were specified, distributed and marketed by West Coast Cycles — a U.S. company similar to WSI. Japanese-manufactured bikes succeeded in the U.S. market until currency fluctuations in the late 1980s made them less competitive, leading companies to source bicycles from Taiwan.

WSI marketed the Centurion brand of road and touring bicycles in the United States using the tag line 'Where Centurion leads, others must follow' and 'A Lifetime Bicycle', offering a warranty without time limit. For a brief period the bikes carried a 'Centurion Bicycle Works' headbadge.

The German company Centurion, which still exists, imported Centurion bikes from Japan to Germany from 1976 on and bought the name-rights in 1990.

History[edit]

According to Frank J. Berto,^[2][3] Raleigh Industries of America had been looking at a Japanese source for their Grand Prix model. Raleigh America ordered 2,000 bicycles from Tano and Company of Osaka but their parent company in England, TI-Raleigh, disapproved — concerned that the Tano-built bikes were too well made and would have outsold their own British bikes.

Raleigh's sales agent, Mitchell Weiner, who was reading The New Centurions at the time, took receipt of the bikes, placed Centurion decals on the bikes and marketed them successfully, subsequently forming Western State Imports after merging with Rick Wilson's company, Wil-Go of Santa Clara, California. Because the bikes had all been intended as Raleigh Grand Prix models, as Centurions, they carried the colors of the Raleigh America Grand Prix model.

Cozy Yamakoshi served as the company's product development manager, designing the bike's frames, coordinating the manufacture of the bikes by Japanese manufacturers, and importing the bikes into the US.^[1] Subsequently, around 1986, Centurion introduced their first Taiwanesebuilt model, the Signet. The Cinelli Equipe Centurion of 1985 (only) was a joint-venture of WSI and Cinelli of Italy.

Early bike sales were limited to the West Coast, with the brand receiving wider exposure by the late 1970s. WSI stopped using the Centurion brand name in 1990,^[4] consolidating their road and touring bikes under the Diamond Back (later DiamondBack) brand. While the brand Centurion had become well known, under the new brand name the company's market for road and touring bicycles soon evaporated. Early Diamond Back models (ca. 1990) carried a top tube decal reading 'Centurion Designed' and stickers near the bottom bracket reading 'Designed in the USA' and 'Exclusively built for WSI.' Diamondback Bicycles was eventually sold to Raleigh USA, and manufacture was moved to Taiwan.

WSI later opened an office in Van Nuys, California, and eventually maintained offices in Dallas, Texas, Denver, Colorado and Dayton, New Jersey — in addition a headquarters in Newbury Park, California. After Weiner died, the company continued its growth under the management of Mike Bobrick.

Cozy Yamakoshi, product and development manager, worked with Mike Bobrick (Executive President of WSI) and Sandy Finkelman (1947–2005)(Diamond Back team manager and product development) and left Diamond Back in 1986, to start Parkpre Mountain Bike in 1989.^[5] Parkpre USA was based in Moorpark, Southern California, USA., producing bikes from the early 1990s until 1998. Ken Yamakoshi, son of Cozy Yamakoshi, is in the process of re-launching Parkpre in the US.

The rights to the brand name Centurion were sold to Germany's Wolfgang Renner ^[de] in 1991. Renner had imported Centurion to Germany since 1976, including made-extra models like the first German mountainbike 'Country'. Today, Centurion remains as a German brand with design and engineering in-house.

Models[edit]

Centurion eventually marketed a full line of road and touring bikes, with steel construction ranging from full (all eight tubes) high-tensile 1020 steel at the lower end, to full (all eight tubes) chromoly bikes at their high end — with top quality componentry. Notable models included:

• Centurion Cinelli Equipe: WSI/Centurion and Cinelli offered the co-branded Centurion Cinelli Equipe for model year 1984/85, as a joint-venture, designed by Cino Cinelli several years after he retired in 1979 and sold Cinelli to the Columbo family, manufacturers of Columbus tubing. The Cinelli Equipe's production was coordinated and supervised by his staff. The bike featured all Cinelli frame components: Columbus SL tubing; chrome chain stay, Cinelli chromed sloped crown, head lugs, bottom bracket shell, handlebars and stem; new-style Cinelli logos embossed on bar and stem, fork crown, seat and seat stays, rear brake bridge and under bottom bracket; Campagnolo dropouts, derraileurs and shifters; Universal 'AER' non-aero brakeset; Ofmega Mistral headset, bottom bracket and crankset; Gipiemme seatpost; Regina chain and CX-S freewheel; Miche 'Competition' hubs and Fiamme, Hard Silver tubular rims. Other markings include a 'Cinelli Equipe' decal on down-tube just above shifters and on left chain stay; an 'Italia: Made in Italy' decal high on seat tube; Columbus tubing decals on fork ('Forcella Originale') and frame ('Acciaio Speciali'); Centurion decals on down-tube (left and right), and a Centurion 'C' decal badge on head tube.
• Centurion Pro Tour:Richard Ballantine's 'Richard's Bicycle Book' included the Centurion Pro Tour (ultimately manufactured from 1976–1984) on his list of 'Best Bikes' in both the 1978 and 1982 updates of his book — along with the Schwinn Paramount P-13, a bike that sold for two to three times the price of the Pro-Tour. Like other full-fledged touring bikes, the Pro Tour models featured a longer wheelbase with longer chainstays for smoother ride especially while loaded, full (all eight tubes) chromoly construction for ride compliance, cantilever brakes to allow room for fenders, internal wiring for a bottom bracket generator and numerous braze-ons: two mounts on the fork for the cantilever brakes, two eyelets in back for a rack and a fender, two eyelets on the fork for a rack and a fender, low rack mounting points on the fork, mounts for two bottle cages, mounts for downtube shifters/cable stops, and seat stay mounts for a rack.

Serial Numbers^[1][edit]

Centurions (except the CinelliCenturion) have serial numbers on the underside of the bottom bracket shell. One way to date a Centurion is to try to find date codes on the bike's components.

Centurion models manufactured in Japan between 1980-1990 use a serial number format WXYZZZZ with:

W = a letter, purpose uncertain, possibly indicates a manufacturer or Centurion;X = a number, indicating the calendar year of manufacture;Y = a letter, indicating the fortnight of manufacture (A = wk 1 & 2, B = wk 3 & 4, etc.)ZZZZ = four digit number, probably indicating frame number during fortnight of manufacture.

N4E0283, as an example, would indicate this is the 283rd frame made during the period of weeks 9-10 in 1984. Barring a major components upgrade at some point in a bike's history, one can confirm a bike's age by the dates found on the majority of components in its groupset.

See also[edit]

External links[edit]

Modern Manufacturers

• Centurion (German) Has the rights to the original company
• Centurion (Denmark) an unrelated company

Original

• 'Centurion Pro Tour Review', Bicycling, December 1976, Page 1, Page 2

References[edit]

1. ^ ^abc'Centurion Bikes'. Sheldonbrown.com, Ashley Wright.
2. ^Berto, Frank J.; Ron Shepherd; et al. (2008) [2000]. The Dancing Chain: History and Development of the Derailleur Bicycle (3rd ed.). San Francisco, CA, USA: Cycle Publishing/Van der Plas Publications. ISBN978-1-892495-59-4. Retrieved May 30, 2017.
3. ^Berto, Frank J.; et al. (2016) [2000]. The Dancing Chain: History and Development of the Derailleur Bicycle (5th ed.). San Francisco, CA, USA: Cycle Publishing/Van der Plas Publications. ISBN978-1-892495-77-8. Retrieved May 30, 2017.
4. ^'Japanese Bicycles in the U.S. Market'. Sheldonbrown.com, Sheldon Brown.
5. ^'A brief history of Parkpre USA'. Parkpre.com.

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.

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:

'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:

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

Merida Bike Serial Number

Notes for Table I:

1. Table I contains dates of frame serializing, and are not necessarily model year. At some time late in each year (generally September or October) frames were built for (then painted with colors for) the next model year. This journal information is summarized by year in Table I. The year designations in the table are approximate; not all of the runs are sequential in time. This may be a result of subcontracting some frame fabrication.
2. For some years, the model number given may be the lowest number (or an X00 number) for a series of models that have the same frame. For example, a 1981 frame appearing on the list as a Model 610 could have been built into either a 613, 614, or 616 bike.
3. Some of the Model 170 serial numbers are 6 digits but do not follow the numerical sequence. A future task is to sort 170 numbers. Some of these are presented in the 83, 84 link at the bottom of the table.
4. Some early and mid 80s bottom brackets were marked with 58TSI or 60TSI. In the early 1980s Tim S. Isaac designed new lugs and a new bottom bracket shell for Trek. The new bottom bracket shell is typically marked with 58TSI (or more rarely, 60TSI). This designation is not part of the serial number but is a model number of the shell. The TSI are Tim's initials. The 58 or 60 refer to the angle between the seattube and the downtube.
5. Some frames in this period have a leading 'A' before the 6 digit number. This may be more prevalent on lower level models. The 'A' may not be part of the SN. Just disregard it when looking up the number in the tables below.
6. Frame Sizes in the SN list below are as given on the paper copy. For some entries, only a two-digit number was given, the extra 1/2 or 3/4 inch was dropped. So - an entry of 22 inches really means a 22.5' frame size, 19 means 19.75', 25 means 25.5'.
7. The list has two major gaps, corresponding to missing pages. Page 9 ends with SN 027870 and the next page starts with 029118. Page 61 ends with 210065 and the next page starts with 215226.
8. The SN list for 1986 has some serial number ranges with annotations about POs (purchase orders) to 'Merida'. These are for Model 800, 830 and 850 mountain bikes and Model 300 road bikes. These were made late in the year, so they probably were all 1987 models. At least some of these were provided to Trek as 'frames only'. One reported SN in these ranges, for an 850, was prefaced by the letters TML. From the serial number list, the number of Trek frames or bikes made by Merida late in 86 totaled at least 8251.
   Merida is a Taiwanese bike company that was established in 1972. It is currently a major, worldwide player in the bicycle business. See http://www.merida.com/ for information on this company.

   LATE 1986 to 1999+

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

FOREIGN-BUILT FRAMES AND BIKES AFTER 1982

1. 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.
   

2. 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.

3. 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.

4. 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.

5. 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:

1. A Flipside model had the serial number JT0116 stamped on the bottom bracket shell. The JT probably stands for 'Jazz' and 'Trek'. The numbers may be the sequential frame number, beginning at 0001.
2. The second type is a 10-character serial number. The first two characters are letters which are followed by eight numbers. Examples are JT09010099 and FI08003231.
3. A Latitude model has a 10-digit, all-numeric serial number: 1230707859. This number also was stamped on the bottom of the bottom bracket shell.

These three serial number forms may mean that Trek used at least three subcontractors for the Jazz line.

MISSING SERIAL NUMBERS

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

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