• I've solved this problem before by putting a nut on the end of the b-screw. I actually went through the probably unnecessary effort of filing a little wedge out of aluminium and then tapping a hole in it so that there was even more contact with the 'tongue'. Something like this:

  • Sorry, was out enjoying Santa Maria. Not flipped the B-screw but maybe one of my bikes was touch and go so I did something funky but I can't remember what it was (probably the older RD style with a 36T on the Kinesis). Most of mine were probably hanging on by the skin of their teeth but that's been fine. :) The Mason has a pretty chunky hanger.

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