Disc brake mount bolts loose...

mith150176
mith150176 Posts: 41
edited September 2015 in MTB workshop & tech
I checked my front disc brake mount bolts earlier to see if they where causing vibration in the front wheel...
they weren't completely tight and won't tighten back up completely into the mounts/forks.
I noticed this over 12 months ago when I swapped from avid elixir to shimano slx brakes(with the same mounts)but managed to get them sorted and seemed to have been fine until now.
Any suggestions,maybe shimano mounts would help,just hoping its not the threads in the forks...

Comments

  • The Rookie
    The Rookie Posts: 27,812
    So presumably this is mounting the calliper and not the disc?

    Is this caliper to adaptor or adaptor to fork, or are they direct mount?

    Is the fork IS or PM mount"
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • mith150176
    mith150176 Posts: 41
    Not too well up on the technicalities,but the caliper mounts onto the adapter
    which connects to the fork with the same bolt..which wont thread completely in till its tight?
  • cooldad
    cooldad Posts: 32,599
    Sounds like post mount (Google is your friend) and the fork mounts are stripped.

    Take them off and examine the threads.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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  • mith150176
    mith150176 Posts: 41
    I did notice a bit of swarf on the bolts when I took them out,
    is there a solution for this if they are stripped?
  • cooldad
    cooldad Posts: 32,599
    Helicoil might work, otherwise new forks, or at least lowers.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • penguin_of_death
    penguin_of_death Posts: 219
    Are the bolts slightly too long?
  • cooldad
    cooldad Posts: 32,599
    Could be if they're the same bolts without the Avid washers. But swarf is never good.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • lpretro1
    lpretro1 Posts: 237
    Might not have bee swarf just some of the original threadlock. Try shorter bolts.
  • JGTR
    JGTR Posts: 1,404
    I swapped from Avid to Shimano, Avids had washers and longer bolts, I used Shimano adapters which came with shorter bolts so your bolts may be too long.
  • mith150176
    mith150176 Posts: 41
    Thanks for the replies,I'll try a new adapter first,
    not in any position to be buying new forks...
    completely jinxed when it comes to bikes!
  • JGTR
    JGTR Posts: 1,404
    [url=http://www.bikeradar.com/forums/viewtopic.php?p=19692800#p19692800]mith150176[/url] wrote:
    Thanks for the replies,I'll try a new adapter first,
    not in any position to be buying new forks...
    completely jinxed when it comes to bikes!

    Merlin Cycles were really helpful, got my kit from them

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