Fettled a proper bodge today. Last week on the nice bike I noticed a bit of a slow shift, looked down and saw the 19 cog was ‘floating’ between the 17 and 21. It would still shift on and off, but a bit rough, credit to Shimano engineering (DA 9000).
It’s the DA cassette that came with the groupset, so I was a bit miffed and although I have an Ultegra spare I want full value from it.
Found that it’s the middle cog of a group of 3, and the heads of all 4 pins have sheared 3 inboard and one outboard, all obscured by the 17 cog so can’t directly replace the pins with something.
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So need to put a spacer between the 19 and 17 cog to hold it against the carrier.
Of course I used zip ties, sanded down from 2.54 ish mm to 2.15ish (spacers officially 2.18)
Three in place, (4th pin wouldn’t move out of the way) carefully orientated to avoid fouling the chain (I hope). And Robert is my Mother’s Brother 😎
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