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  1. #1
    Junior Member
    Join Date
    Nov 2012
    Location
    Culver City, CA
    My Bikes
    Cannondale Tandem, Wilier Gran Turismo
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    1" threaded tandem fork

    1998 Cannondale Tandem. The fork crown race seat is worn down, so that the crown race is loose. Tried the hammer and punch method (thanks Sheldon) but no luck. Any suggestions for an inexpensive replacement fork?

  2. #2
    Member
    Join Date
    Dec 2011
    Location
    SF Bay Area, CA
    My Bikes
    1994 Santana Sovereign tandem, 1999 Trek 5000, 1985 Specialized Allez SE
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    I have yet to see an inexpensive tandem rated 1" fork -- threaded or threadless. If your team is light and you ride mostly on the flats, some would say a 1" touring fork is sufficient. But even those aren't as common as they once were. Santana sells a replacement 1" tandem fork -- but it isn't cheap and it's threadless.

    Taking another stab at repairing your 1" fork might be the best choice. Maybe using a steel epoxy like JB Weld would be enough to take the play out of the crown race?

  3. #3
    Senior Member
    Join Date
    Dec 2013
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    Rodriguez, Ibis
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    not sure how you look at "inexpensive" but Rodriguez will make one for you for $225: Steel bike frames - Handmade by Rodriguez Bicycles Company in Seattle

  4. #4
    xlbs
    Join Date
    Jul 2015
    Location
    Bailieboro, Ontario, Canada
    My Bikes
    Serotta Legend, Miyata 610 , Specialized Stumpjumper Comp, Santana Cilantro tandem, Fontan vintage road
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    Sometimes you can shim a crown race with an aluminum shim cut from a soda or beer can. If your shim will fit around the entire circumference of the crown race you may well be able to save the fork---this will keep the race centred on the crown so your future wear patterns will be stable.

    You'll know soon enough whether this will work when you drive on the race. Trim excess shim material with an exacto knife and you should be on the road.

    This may sound like a less-than-acceptable practice, but I've used it to good effect on a number of older and worn crown races on otherwise perfectly good steel forks.

    The cost of an attempt is very low, and not high risk either.

    Let us know how it goes.

  5. #5
    Junior Member
    Join Date
    Aug 2015
    My Bikes
    2001 Cannondale RT3000, 1990(?) Fisher Gemini, 2001 Burley Duet, 2004 Ed Litton BreakAway travel bike, 2001 Bianchi Eros, (?) Bianchi Volpe, (?) Rodriguez, (?) Specialized Rockhopper, 1972 Atala Competizione
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    Quote Originally Posted by zavsdad View Post
    1998 Cannondale Tandem. The fork crown race seat is worn down, so that the crown race is loose.
    Any competent frame builder can repair the race seat. It would probably torch the paint, but it's a pretty easy repair.

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