Grrrrr ISIS.

The Northern Monkey
The Northern Monkey Posts: 19,136
edited January 2010 in MTB workshop & tech
Went for a night street ride on the Saracen last night and after about 5 mins noticed the bloody crank arm bolts had already come undone (only been on there a week!).

Is it jsut a case of getting a load of locktight on the bolts and keeping a big allen key with me to check them before each ride?

What actually makes tham come loose?
Santa Cruz Butcher

Comments

  • ilovedirt
    ilovedirt Posts: 5,798
    No idea, my old truvativ cranks used to do this until i got rid of them. They were crap.
    Production Privee Shan

    B'Twin Triban 5
  • The Northern Monkey
    The Northern Monkey Posts: 19,136
    Yea I fecking hate ISIS drive.

    I can't do the bolts any tighter or i'll round them off!
    Santa Cruz Butcher
  • biff55
    biff55 Posts: 1,404
    bigbenj_08 wrote:
    I can't do the bolts any tighter or i'll round them off!

    then threadlock is the answer :wink:
  • salsarider79
    salsarider79 Posts: 828
    Check the condition of the cranks. If they've come loose before, and/or have been ridden any distance while loose, the threads may be damaged.
    jedster wrote:
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    FCN 8 off road because I'm too old to go racing around.
  • nicklouse
    nicklouse Posts: 50,673
    just tighten them up properly and check them after the first ride.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • ben1777
    ben1777 Posts: 128
    I gave up in the end and just let the splines destroy themselves then bought a Hollowtech II crankset! :lol:
    Who Dares Wins
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  • The Northern Monkey
    The Northern Monkey Posts: 19,136
    nicklouse wrote:
    just tighten them up properly and check them after the first ride.
    Check.

    Tightened them last night ("properly") and check again this morning after a ride and they were loose :(

    Waked a load of loctite on there now so i'm hoping they'll hold!

    bolts and threads look fine (new BB) i just can't tighten them any more or the bolts will round off!
    Santa Cruz Butcher
  • nicklouse
    nicklouse Posts: 50,673
    they will need tightening again.

    just like the old square taper.

    when i say tight i mean it.

    that taper on the splines is a pain.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • The Northern Monkey
    The Northern Monkey Posts: 19,136
    Yeah its a full on PITA. I've got it as tight as possible, think i'll just carry a allen key with me lol!
    Santa Cruz Butcher
  • Whytepeak
    Whytepeak Posts: 2,616
    bigbenj_08 wrote:
    Yeah its a full on PITA. I've got it as tight as possible, think i'll just carry a allen key with me lol!

    Yep, always take an allen key out with you, they have a habit of coming undone when you're out in the sticks.
    Now that we are strong ought to bear the infirmities of the weak and not to please ourselves. ROMANS 15:1

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