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  • That is a headset spanner, they are not designed for removing the fixed cup of a bottom bracket. The correct tool is a vice.

    Well it used to fit my bb tool (32mm) and has plenty of leverage, you can see why i gave it a try. I've use it successfully many times in the past. I don't have a large enough adjustable spanner or a vice. Time to get one.

    What i'm worried about is damaging the frame if I use it for leverage. I am going to need to use more force than is required to destroy a good quality headset spanner. After all modern frames are often only strong in the places their designers want them to be

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