Cant fully tighten my cranks

Chucker_Dude
Chucker_Dude Posts: 209
edited August 2007 in MTB workshop & tech
Sorry to start another thread about my cranks, but this is a problem im really unsure of.

If my crank gets tightened as much as physically possible. It still has a bit of a wobble. The crank is brand new so its not bent and the bike is a week old so surely the bottom bracket can be damaged?

any ideas? :?
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Comments

  • supersonic
    supersonic Posts: 82,708
    Do both crank arms move together? Grab them and shake. If so its the BB. If not, the crank arm. Either way, take it back.
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  • stu8975
    stu8975 Posts: 1,334
    If its a square taper crank/bb, make sue you havent overtightened them aswell,45 - 50 Nm max, the more you tighten the crank nuts/bolts past the recommended setting, the bigger the hole in the crank arm gets. Im of average size/build and could easily go past the 45-50Nm setting if i didnt use a torque wrench..ie a normal socket set. Take it to you LBS if you cant get hold of a torque wrench to check the torque
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  • Chucker_Dude
    Chucker_Dude Posts: 209
    thanks for the advice guys but sadly its not a crank problem. The thread of the BB has become warped/damaged, this means whenever you put the crank bolt in, the BB just eats it up. My bolt is compelty bald now.

    New BB for me :roll:
    New picture's and video's
  • skyliner
    skyliner Posts: 613
    New crankbolt too. They don't come with BB's in some cases.
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  • Rockhopper
    Rockhopper Posts: 503
    Shouldn't you be taking i back to the shop it came from and getting them to sort it out?

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