Cycling Equipment · Public discussion

Truing Brake Rotors?

Started by (PeteCresswell) · · Last activity · 7 posts · 257 views

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Cycling Equipment
Published
7 November 2007
Last activity
9 November 2007
Original author
(PeteCresswell)
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7
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  1. My front rotor wobbles a few mm - just enough so that it either
    squeaks intermittently, or there's too much lever travel -
    depending on the pad clearance.

    I can see truing a really-taco-d rotor with a hammer and/or some
    educated bending... but this is much more subtle.

    Is there a technique?

    My kneejerk was application of sufficient heat, followed by
    sandwiching it between two dead-flat surfaces - probably also
    heated quite a bit, but I'd guess there is a loss-of-tempering
    issue lurking there.
    --
    PeteCresswell

  2. (PeteCresswell) said:

    My front rotor wobbles a few mm - just enough so that it either
    squeaks intermittently, or there's too much lever travel -
    depending on the pad clearance.

    I can see truing a really-taco-d rotor with a hammer and/or some
    educated bending... but this is much more subtle.

    Is there a technique?

    Use a crescent wrench to bend and the caliper as a truing stand. If
    you're a gear head, you can get the "proper" tool:

    http://www.amazon.com/Park-Tool-Rotor-Truing-Fork/dp/B000HJDVCS

  3. (PeteCresswell) said:

    My front rotor wobbles a few mm - just enough so that it either
    squeaks intermittently, or there's too much lever travel -
    depending on the pad clearance.

    I can see truing a really-taco-d rotor with a hammer and/or some
    educated bending... but this is much more subtle.

    Is there a technique?

    Use a crescent wrench to bend and the caliper as a truing stand. If
    you're a gear head, you can get the "proper" tool:

    http://www.amazon.com/Park-Tool-Rotor-Truing-Fork/dp/B000HJDVCS

  4. On Wed, 07 Nov 2007 16:48:38 -0500, "(PeteCresswell)" <[email hidden]>

    Quoted message said:

    My kneejerk was application of sufficient heat, followed by
    sandwiching it between two dead-flat surfaces - probably also
    heated quite a bit, but I'd guess there is a loss-of-tempering
    issue lurking there.
    --

    really bad idea, and a really big thread diversion opening!

  5. On Wed, 07 Nov 2007 16:48:38 -0500, "(PeteCresswell)" <[email hidden]>

    Quoted message said:

    My kneejerk was application of sufficient heat, followed by
    sandwiching it between two dead-flat surfaces - probably also
    heated quite a bit, but I'd guess there is a loss-of-tempering
    issue lurking there.
    --

    really bad idea, and a really big thread diversion opening!

  6. (PeteCresswell) said:

    My front rotor wobbles a few mm - just enough so that it either
    squeaks intermittently, or there's too much lever travel -
    depending on the pad clearance.

    I can see truing a really-taco-d rotor with a hammer and/or some
    educated bending... but this is much more subtle.

    Is there a technique?

    yes. careful bending.

    Quoted message said:


    My kneejerk was application of sufficient heat, followed by
    sandwiching it between two dead-flat surfaces - probably also
    heated quite a bit, but I'd guess there is a loss-of-tempering
    issue lurking there.

    hard. unnecessary. counter-productive.

  7. (PeteCresswell) said:

    My front rotor wobbles a few mm - just enough so that it either
    squeaks intermittently, or there's too much lever travel -
    depending on the pad clearance.

    I can see truing a really-taco-d rotor with a hammer and/or some
    educated bending... but this is much more subtle.

    Is there a technique?

    yes. careful bending.

    Quoted message said:


    My kneejerk was application of sufficient heat, followed by
    sandwiching it between two dead-flat surfaces - probably also
    heated quite a bit, but I'd guess there is a loss-of-tempering
    issue lurking there.

    hard. unnecessary. counter-productive.

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