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  • Thank you. I will check that out. I have a spare seatpost. But no, upon reflection, it creaks when I am out of the saddle. Sorry, that reply was to user80021.

    I bought a new carbon bike frame and had the old one swapped out for "bottom bracket creaks" in the past, but subsequently thought that the creaks they were probably caused by loose chain rings. This frame is old but I have not bashed it like that last one.

    The chain has a "missing link" since I failed to install it using the standard Shimano method. I wonder if the chain is to blame.

    I could swap the cranks (and pedals) with my other bike.

    I hate compact cranks since I spend so much time in my highest gear (which means more stress on the freehub and their demise). The crankset on my other bike is not compact. I hope it is that so I can have an excuse to purchase another crankset.

    The quick release idea is interesting. I will tighten it up before I ride home.

  • Don't just tighten it up, take it out, clean it and also clean the faces of the frame where it attaches (the inside and outside of the dropouts).

  • Señor_Bear PhilDAS and Scillu.Suffolk were right
    I cleaned out the dropouts with brake cleaner.

    I also scored the paint from surface of the dérailleur hanger into which the quick release could not embed (unlike the other three aluminium surfaces of the dropouts themselves), and tightened the hanger bolt.

    But basically it was a case of dirty dropouts.

    Thanks very much indeed. I junked a carbon frame for this! Two of my local bike shops (rather non-sportive admittedly) did not know what was going on. This needs to be shouted from rooftops. I'll post to the other thread mentioned above.

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