strange brake problem

carrock
carrock Posts: 1,103
edited September 2012 in MTB workshop & tech
Just bought crux elite crosser with avid bb7 discs

Suddenly there is a noise every rotation of the wheel which sounds like something catching. the fact the noise occurs once per revolution, and varies with speed leads to to assume there is something on the disc rather than the pads ( which would create a continuous noise ).

However, have wiped the disc down and sanded with light emery paper and the noise is still there.....havent pulled the pads out yet as they wouldn't cause a rotational noise, only a constant

Puzzled....anyone any clues??

Comments

  • jonomc4
    jonomc4 Posts: 891
    bent disc?
  • nicklouse
    nicklouse Posts: 50,675
    new rotors and new pads? just use it and they will sort themselves out.

    it is often just the surface finish on the rotors causing the noise untill eveything beds in.

    Some noise is normal.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • carrock
    carrock Posts: 1,103
    thanks. will see if it beds down. I have just had a thought that one of the disc bolts may have worked slightly loose and is catching on the fork/caliper so will check that as well

    Cheers
  • Disc bolts should be fitted using a medium threadlock such as loctite...
  • nicklouse
    nicklouse Posts: 50,675
    coupe3234 wrote:
    Disc bolts should be fitted using a medium threadlock such as loctite...
    Loctite is a Brand not a type.

    Some Loctite products are not suitable.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • deveng
    deveng Posts: 132
    coupe3234 wrote:
    Disc bolts should be fitted using a medium threadlock such as loctite...

    Some loctites are designed to never come undone....

    I think you're thinking of loctite 243 (or blue loctite).
    Wilier Izoard XP 105
    Saracen Zen 1
    SRAM/RaceFace 1x10