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  • Hey, Recently built up an mtb and its super fun, although my cranks keep coming loose which is annoying.

    I greased the crank bolts but maybe I should have used thread locker?

    If so which thread locker?

    Also, my chain ring is a bit bent which is annoying, any idea how to fix that?

  • my cranks keep coming loose which is annoying.

    I greased the crank bolts but maybe I should have used thread locker?

    Square taper / octalink etc or something with outboard bearings? If it's the former they are almost definitely fucked, if it's the later it's likely but not certain they are damaged now.

    my chain ring is a bit bent which is annoying, any idea how to fix that?

    The 'beside the trail fix' is to give it a wack with a rock. I'm sure you can find some method of applying the required force with a bit more finesse. But I'd cough up for a new chainring if it's causing problems.

  • Square taper

    That relic is a poorly designed four-spline interface.

  • Thanks guys,

    It's a square taper bottom bracket with a set of Middleburn rs1's.

    I really hope not as I love the cranks!

    @mdcc_tester

    I'll try using different bolts and tighten them more.

    Do people grease them or thread lock?

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