Crank arm threads

Kiddy Dan
Kiddy Dan Posts: 37
edited July 2011 in Workshop
So, i looking around in my LBS and happened to tell them about my FD not reaching out to the furthest ring, so they offered to tighten up my chain set, I have known them personally for a quite a long time so this was free of charge, I got my bike back and they said to me "the pedals were also loose so I tightened them for you", this job took about 3 minutes to do, a couple of days later on my ride home from work I realised that my right pedal was very loose, and was digging into the metal on the crank arm. I got home and the pedal just fell out with a tiny pull on it outwards. Before all of this my bike had been running perfectly since I had put it together. My initial thoughts are that when they tightened the pedals they took them out and put them on again but cross headed it and didn't want to tell me. I am wondering where I could go to find a replacement crank arm on the internet or if I could re thread the crank arm at home? I do not have very much money so if I did take it back to the shop and ask them to fix it, how much would they be likely to charge
I have a FSA Vero Triple Crank Set
Need replacement or fix or right hand crank arm, thread has been worn down where the pedals go in.
Thank you very much in advance (I'm sure I'll say thank you again for a reply :D)

Comments

  • pompy
    pompy Posts: 127
    Maybe speak to the shop and tell them what happened without sounding too accusing!). It sounds that you know them well so they might hold their hands up to it.

    Failing that, I don't think it is repairable, pedal threads are the same diameter so any re-threading would leave a bigger hole, plus, this is an area of high stress so I wouldn't mess with it.

    I would look on ebay, the FSA Vero is a crank fitted to lots of bikes to save a bit of money on bikes where the dedicated crank is more expensive (eg. 105 spec bikes) so there should be plenty of people wanting to sell them to upgrade.

    Good luck!
  • kettrinboy
    kettrinboy Posts: 613
    The only viable repair really would be to get it helicoiled, and that needs doing by somebody who knows what he,s doing to get it nice and square, so probably getting a new or good condition crank secondhand would be the best thing to do.
  • pompy
    pompy Posts: 127
    Here is a new one at CRC for £39 http://www.chainreactioncycles.com/Mode ... roducts-UK

    Not many on ebay atm but a new one is about the same price!
  • Monty Dog
    Monty Dog Posts: 20,614
    I expect that you'd been riding with loose pedals which damaged the thread. The act of tightening simply stripped the remnants of the damaged thread. Most mechanics take pride in their work and would know how to fit pedals without stripping the thread. helicoil is the answer try Highpath Engineering if your LBS can't do it
    Make mine an Italian, with Campagnolo on the side..
  • onbike 1939
    onbike 1939 Posts: 708
    Monty Dog wrote:
    I expect that you'd been riding with loose pedals which damaged the thread. The act of tightening simply stripped the remnants of the damaged thread. Most mechanics take pride in their work and would know how to fit pedals without stripping the thread. helicoil is the answer try Highpath Engineering if your LBS can't do it

    +1

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