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  1. #1
    Fred
    Join Date
    Jul 2005
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    Boston, PRM
    My Bikes
    1983 Schwinn Super Sp0rt, Trek hybrid, eBike, Xootr
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    Trek 720 serial number mystery

    I looked at the bottom bracket shell of a Trek 720 cyclocross-style frame I bought
    as suggested at: http://www.vintage-trek.com.

    Stamped there is: "TOC 51605." Is this a Trek SN, or something a dealer or owner might have added? It doesn't seem to fit into the Trek format mention above.

  2. #2
    biked well well biked's Avatar
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    Jul 2005
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    There are two types of Trek 720's that I know of. The 720 touring bikes from the early '80's, some of the best tourers ever made. Then there are the later 720's, the "Multi-Trak," which are hybrid bikes. If you read the section on the vintage trek site about serial numbers for Treks built in Taiwan from '87 through '90, I think you'll find that the format fits your serial number. They start with a T, followed by a numeral (in your case zero), then a letter, then five numerals. This would make your Trek 720 one of the Multi-Traks, a hybrid bike-

  3. #3
    Banned.
    Join Date
    Sep 2003
    Location
    Home alone
    My Bikes
    Trek 4300 X 2. Trek 1000, Trek 6000
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    I just bought a 1990 trek 720 multi track. Are they complete crap or do they have some worth? I just bought it to play with and have no real plans for it.

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