Dating a mountain biker
These frames may be related to the M and N leading serial number bikes in the section above. Trek used this form of serial number (leading O "oh") for their custom-made 950 frames.The production (non-custom) frames were numbered using the late 1980 to 1986 system described below.This variation to the SN system may have been done to extend the numbering system.By using the fourth character as an extension of the last three, the serial numbers could be extended from 2600 possible combinations to 26,000 for a given month. Serial numbers for four model 510 frames (with a leading F) have been reported that have similar unexpected year dates.
According to the brochures, Trek did not make 41X and 61X bikes or frames during 76, 77, 78, and 79 and also not in 83, 84, 85, 86, 87, 88, or 89.The top dogs of downhill have been united around the table, and they aren't here to mess about...Priding itself on bringing together Downhill Mountain Biking's most talented and charismatic riders outside of the tape, on tracks tailored for madness; Steel City Media and Creative Concept bring you the much anticipated feature film 'GAMBLE'. This does not apply to the all-numeric serial number form that began in late 1980. For these all-numeric numbers with a leading zero, see LATE 1980 to LATE 1986 below. It appears that some custom frames were built that did not fit within the standard model description. The last three characters - The final letter ranges from A to Z and the final two numbers go from 01 to 99. 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.A couple of serial numbers have been submitted that are missing the first letter. For example, a 710 frame made with Columbus tubing instead of 531. The last letter might be a run designation, with the last two numerals the frame number in that run? Hence the change to the sequential system that was started in late 1980.
One interesting variant of the SN code has been submitted.