Loose left crank arm !

KonaMike
KonaMike Posts: 805
edited May 2008 in MTB workshop & tech
My left crank arm worked loose at Cwmcarn yesterday,it tightened back up OK and seemed to stay tight the rest of the way round ,although it played on my mind on the downhill section !

My mate says that once a crank arm has worked loose it must be replaced as it will keep loosening ,is this true as I have been to Cwmcarn a dozen times this year and I have never had any problems before ??

Comments

  • nicklouse
    nicklouse Posts: 50,673
    it all depends if there has been any damage to the crank axle interface.

    if it now continues to come lose then yes it will need replacing but if it stays tight then it will be fine.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • KonaMike
    KonaMike Posts: 805
    I inspected the axle and the arm when I got home and they seem fine so I will stick with it !

    Cheers
  • Splasher
    Splasher Posts: 1,528
    If you're going to stick with it, at least loctite your bolt.
    "Internet Forums - an amazing world where outright falsehoods become cyber-facts with a few witty key taps and a carefully placed emoticon."
  • KonaMike
    KonaMike Posts: 805
    Thanks for the tip ,I will stick a bit of Loctite on the threads :) I might have a bit more confidence in it then !
  • sam1492
    sam1492 Posts: 21
    I had the exact same problem i just tightened the pinch bolts and crank bolts up and theyve been fine since
  • KonaMike
    KonaMike Posts: 805
    Cheers Sam,I will just keep an eye on it.

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