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Obtaining replacement Bontrager Sport RH Crank Arm

cmm303cmm303 Posts: 59
edited November 2010 in Workshop
I need to replace a RH Crank arm on a 2008 Trek because of a badly damaged thread. Thought it would be easy, but not having much success in finding an exact replacement. Chain Reaction sell crank arms but not the Bontrager Sport and then most are LH cranks. Ebay not looking much better unless I am not using the right search.

Any suggestions on where to try?
What about alternatives? Would I have to buy a set with the rings or are ring fittings standard? New to this so I welcome any suggestions for a readily available and appropriate substitute make/model?

I would be grateful for any thoughts - many thanks.


  • AnonymousAnonymous Posts: 79,667
    A Trek dealer?
  • keef66keef66 Posts: 13,123
    I suspect your options are:

    a) as Nap D suggests, a Trek dealer for an exact replacement
    b) replace the whole crankset (I'd probably go for 105 or ultegra) and probably the BB too
    c) get the thread repaired using a Helicoil insert. (I'm assuming it's the pedal thread that's mangled??)

    b) would be the quickest option I imagine. And the shiniest.

    I have no idea about the relative costs of the others
  • PokerfacePokerface Posts: 7,960
    My experience with replacing crank arms is that is usually better to replace the whole chainset. The reason being that you can get a deal for a set - but a replacement part will be full retail (as it's special order).

    For instance - I wanted a left hand Sram Red crank arm. Cost is £150, but a whole new chainset was only £200.

    P.S. Get in touch with Evans Cycles - they have a special order department and deal with Trek/Bontrager. If the part can be ordered - they should be able to give you a price.
  • cmm303cmm303 Posts: 59
    Thanks guys for so many useful suggestions. Certainly highlights that though not the end of the world, it will take a bit of leg work and doh. btw, it is the pedal thread that is no longer.
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