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  1. #1
    me have long head tube TallRider's Avatar
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    cable-clamp bolt and quick-release road brakes has lots of play

    I'm rebuilding my Raleigh road bike to keep in California, and I've installed Nashbar "Jail Brake" dual-pivot road caliper brakes.
    The brakes seem to work fine, but when tightening the bolt down on the brake cable, I notice there's a lot of play between the caliper arm and the quick-release mechanism that holds the clamping bolt.

    I've taken a couple of photos to show the range of play. I disconnected the cable tension for the shot, as any tension will obviously pull the clamping bolt into the "up" position (the crisper of the two photos). I cropped the photos so that they're basically the same angle, but it's not perfect. Nevertheless, you can easily see the difference between the clamping bolt being "up" and "down".

    The actual range of play is greater than what is pictured; those are just the spots that would "hold" by themselves when I pushed the bolt into position.

    I'm just wondering if this points to any problem down-the-road. I doubt that it does, but it may and wanted to get people's reaction. There appears to be no way to adjust the quick-release mechanism or tighten it.

    Here's Nashbar's picture of the brake itself (linked to a larger photo):


    and here's my animated-gif picture of the clamping bolt's play:

    Last edited by TallRider; 02-19-09 at 10:27 AM.

  2. #2
    Great State of Varmint Panthers007's Avatar
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    Looks like it was built this way. Possibly due to the play needed to use the QR on the brake. I wouldn't worry about it (I'm a perfectionist too - you'll worry anyway). Just keep half an eye on it should it get worse. Try engaging the QR and see if it changes the play.

    Nice .gif by the way!
    How do you keep an idiot in suspense?

  3. #3
    me have long head tube TallRider's Avatar
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    glad you like the animated .gif - the difficult part was cropping two photos so they're approximately the same angle.

    I don't think that there's any functional purpose of the clamp-bolt mechanism having play where it attaches to the quick-release, but neither do I think that it's likely to be a problem. Just a perfectionist, yes

  4. #4
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    I have the same thing happening on my 600/Ultegra side pulls. No idea how long it's been like that but it's never been a problem except in my head.

  5. #5
    Great State of Varmint Panthers007's Avatar
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    Just checked my vintage Modolo Speedy brake-set - bought NOS out of Norway - and it has the same play when I flip it's QR lever. Checked 2 other sets of the Speedy brakes. Ditto.

    See what you've done to me?!
    How do you keep an idiot in suspense?

  6. #6
    me have long head tube TallRider's Avatar
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    Quote Originally Posted by Panthers007 View Post
    Just checked my vintage Modolo Speedy brake-set - bought NOS out of Norway - and it has the same play when I flip it's QR lever. Checked 2 other sets of the Speedy brakes. Ditto.

    See what you've done to me?!
    I need you to come to Chapel Hill and check all of my bikes too

  7. #7
    Great State of Varmint Panthers007's Avatar
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    Quote Originally Posted by timcupery View Post
    I need you to come to Chapel Hill and check all of my bikes too
    How do you keep an idiot in suspense?

  8. #8
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    If there were no play you wouldnt be able to operate the QR

  9. #9
    me have long head tube TallRider's Avatar
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    Quote Originally Posted by AndrewP View Post
    If there were no play you wouldnt be able to operate the QR
    this may be true, but the amount of play (i.e., lack of preload) required for the QR to be moved, is quite small.

    But in this case, the play is not the in QR mechanism itself. Rathe, it's where the clamping bolt mechanism attaches to the QR mechanism. All that's required is that it be able to turn (so when the QR is flipped the clamping bolt mechanism stays in line with the cable) but it has way, way more play than necessary to ensure this.

  10. #10
    cab horn
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    You do realize this is a $20 brake right...
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  11. #11
    Great State of Varmint Panthers007's Avatar
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    On my Modolo's there is only play that's noticeable when the QR is released as I mentioned. Are yours showing this play with the QR in the loose position? One other query: Who actually makes those Nashbar brakes? Are they any good? Review please. Never heard of anyone with them - until today.

    <jiggle, jiggle...>
    How do you keep an idiot in suspense?

  12. #12
    me have long head tube TallRider's Avatar
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    I think the brakes are made by Tektro. Though I'm not totally sure.
    And I realize they're on the cheap side. Though not $20 cheap - they currently retail for $35, though I think I got them on sale for $25 (a common sale price at Nashbar) a couple of years ago.
    The brakes work fine. Same mechanical advantage as any dual-pivot brake. Lots of people dislike the Tektro cartridge pads, and while they're not great, they're okay. I'll see how they do as I ride the bike more, though. The pads do have adjustable toe-in.

    Panthers007: I described the play in more detail in my previous post:
    the play is not the in QR mechanism itself. Rather, it's where the clamping bolt mechanism attaches to the QR mechanism. All that's required is that it be able to turn (so when the QR is flipped the clamping bolt mechanism stays in line with the cable) but it has way, way more play than necessary to ensure this.
    So in my case, the play is independent of the QR mechanism, probably just the result of cheap quality control but unlikely a real worry.

  13. #13
    Great State of Varmint Panthers007's Avatar
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    Thanks! They might be a good contender for some fixer-uppers (of a better genre than average pickin's) I've found. Do let us know if they explode. LOL.
    How do you keep an idiot in suspense?

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