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  1. #1
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    ticking from new 203 rotor on hard downhill braking

    just installed new 203mm rotor on front end. first real downhill ride heard a rapid tick,tick,tick,tick, sounded like a quiet fully auto rifle. know its front brake cause i let off and noise is gone. brakes awesome just a little disturbing that all my braking power( front ) has a new noise. any suggestions???

  2. #2
    RAKC Industries
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    Its a new rotor, make sure its not warped and ride it. Did you make sure and bed it prior to heading down that decent?

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  3. #3
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    ya had a few rides on it before i took it out. not warped straight as an arrow.

  4. #4
    Mr. Buck E. Fikes
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    Is the caliper spaced correctly for a 203 so that the edge of the rotor is not contacting the caliper housing? Your description of a fast "tick" makes me think of the indentations built into the circumference of a rotor.

    Also, is it a 29'r? I've had a cheap build of 9'r wheels that had a lot of flex and when riding hard, especially railing hard in turns, the rotor would make contact with the pads without actuating the lever. IDK...just some random thoughts on a cause without seeing it.

  5. #5
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    no niner and no rub on caliper at all. have a good 2-3 mm of space on caliper to rotor at closest area while spinning. 26" bontrager wheels

  6. #6
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    ya i understand just fishing for ideas as its hard to diagnose while hauling *$$ down a hill. only makes noise on semi hard downhill braking,no noies in rock gardens,hard turning,air,ect and not sure if on HARD braking it will do it as i never grabbed a WHOLE handfull of front brake

  7. #7
    damned rocks...
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    It only happens when you brake?
    Are your calipers centered and both pistons move equally?

  8. #8
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    ya had no trouble at all with old rotors centered exactly wheel spins free

  9. #9
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    Youíd think new rotors are perfect but I havenít gotten one yet. If itís a ticking sound, Iíd think your pads are catching an edge somewhere. Maybe the rotor has a hole that isnít chamfered enough, or maybe the rotor is catching something on the edge of the rotor.
    Or, the rotor is true enough not to rub when not braking, but it is warped sharply enough over a short distance that it almost ďcatchesĒ the pad on braking and makes that tick.
    Iím no brake guru, but thatís what it sounds like to me.

  10. #10
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    I think the pads aren't parallel with the rotor, pads can be clear of the rotor and yet not parallel to it.
    Let us know what you find.
    Niner Jet 9 RDO, Scalpel 29, XTC 650b, 04 Stumpjumper FSR Pro, Trek Rigid SS - No suspension, no gears....no problem

  11. #11
    Out spokin'
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    Normal rotor vent hole flutter?
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  12. #12
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    vent hole flutter? cant say ive ever experienced that...these rotors have somewhat big vent holes tho. last rotors had the small holes(size of a pencil lead) these are 1/4to5/16th so quite a bit larger.

  13. #13
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    thx for all the input. at least it gives me some different directions to go

  14. #14
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    I get some ticking sound and i think its what someone here called normal vent hole flutter.

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  15. #15
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    Thx everyone. Replaced rotor again and started over with caliper adjust No more noise. Thx

  16. #16
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    I've/I experience this, running metallic pads...

    Larger particles in the pad don't wear like the rest of the uniform & smaller particle'd pad.

    I've even had a large particle wear a groove into my rotor >.<

    'We'll all make it to the top... Some of us, might not make it to the bottom'
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