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  1. #1
    Je pose, donc je suis.
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    Older Trek 520 Fork: Unthreaded Rack Drillings

    I just picked up an older Trek 520. The front fork has rack mounts mid-fork, but they are un-threaded. Obviously, I could just add a nut on the inside, but there isn't much 'flat' there for a snug fit.

    It kind of sound like a dumb question, but is this what is done with older forks? Am I missing something?

  2. #2
    __________ seeker333's Avatar
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    You could always tap some threads. IMO doesn't matter one way or the other. I'd go the simple route and use a bolt and nut.

  3. #3
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    I had one like that - through-bolt worked fine.
    ...

  4. #4
    The Rock Cycle eofelis's Avatar
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    Quote Originally Posted by valygrl View Post
    I had one like that - through-bolt worked fine.
    I had one too. Got some long bolts and plenty of washers and double-nutted them. Worked great.
    Gunnar Sport
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  5. #5
    Je pose, donc je suis.
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    Well that settles that. Thanks.

  6. #6
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    Get the Nyloc style nuts that won't come loose. They have a nylon ring inside the nut which is smaller than the bolt and grip like glue. an alternative works if you have some silicone sealer, fill the first three threads of the bolt and turn it in. It locks the bolt in. I use it on all my attaching bolts like racks and fenders. I had some when installing those items and it worked well. If you use loctite only use the blue mild hold not the red permanent.
    " If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or your arms. Crouch down and lick the hand which feeds you. May your chains set lightly upon you, and may posterity forget that ye were our countryman " Samuel Adams, 1772

  7. #7
    Real Men Ride Ordinaries fuzz2050's Avatar
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    You can also use the unthreaded holes to your advantage and use the other style of front rack, like the old Blackburn CL-1

    bmcl12-1.jpg
    or the Tubus Duo
    Tubus%20Duo%20Front%20Bicycle%20Rack%201.jpg

    I think they look better.

  8. #8
    Je pose, donc je suis.
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    Quote Originally Posted by fuzz2050 View Post
    You can also use the unthreaded holes to your advantage and use the other style of front rack, like the old Blackburn CL-1

    bmcl12-1.jpg
    or the Tubus Duo
    Tubus%20Duo%20Front%20Bicycle%20Rack%201.jpg

    I think they look better.
    Yeah. That Tubus is purty.

  9. #9
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    I have the Tubus Duo and love it. Very stable, looks great, and is easy to take on/off and to pack (I have S&S bikes for traveling). You can use the Duo even if you have threaded bosses, just to be clear, but you'll need to put a nut on the end of the bolt. You can't use a Duo if you only have threaded bosses on one side of the fork; has to be a through-boss to use (my new/used Co-Motion Nor'wester only has braze-ons on one side of the fork, so I'm trying to figure out what to do now).

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