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  1. #1
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    Jul 2006
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    Suspension Fork Upgrade

    I have a Trek 3900 with a 70mm travel fork and was wondering how much more travel I could put on the bike before I mass up the geometry to much.

  2. #2
    I drink your MILKSHAKE Raiyn's Avatar
    Join Date
    Jul 2002
    Location
    St. Petersburg, FL
    My Bikes
    2003 Specialized Rockhopper FSR Comp, 1999 Specialized Hardrock Comp FS, 1971 Schwinn Varsity
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    80mm would be safe, at 100mm you'll feel the handling get a bit slower, 120 and above will wreck your handling.

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