• It will go into the 9th cog but the chain is no longer engaging with the cog in the RD at this point. It will go into the 10th cog if I hold the shifter as far as it will go (suppose it needs more tension) but still it’s not engaging with the teeth in the top cog of the RD.

  • If you back the B screw out slowly now that you know it will clear, the top pulley wheel should move forward and catch the chain

  • Thanks, that has worked! It’s making a bit of noise in the top cog but its shifting through all gears. That will do for now and I need to get on with other stuff.

    Thanks everyone who’s helped, feeling a lot less stressed now.

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