Not sure why this won’t post with the photos but bike is a 1×11 42 chainring and I run two different rear cassettes one a 11×34 shown and 11×42. does the extreme bend of chain because the derailleur is so far back when on the 11 tooth cog cause any extra chain wear or cause any more drivetrain friction? I can not really feel it if it does. It shifts really good up and down with both cassettes when it is this length. If I shorten to pull the derailleur cage a bit forward it still shifts good with the 11×34 but does not shift as well shifting down ie going to bigger cogs in the last couple of bigger cogs.
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Not sure why this won’t post with the photos but bike is a 1×11 42 chainring and I run two different rear cassettes one a 11×34 shown and 11×42. does the extreme bend of chain because the derailleur is so far back when on the 11 tooth cog cause any extra chain wear or cause any more drivetrain friction? I can not really feel it if it does. It shifts really good up and down with both cassettes when it is this length. If I shorten to pull the derailleur cage a bit forward it still shifts good with the 11×34 but does not shift as well shifting down ie going to bigger cogs in the last couple of bigger cogs.
The pictures are there
You need to bring your B-limit WAAYYY closer
https://www.parktool.com/en-int/blog/repair-help/rear-derailleur-adjustment
But more importantly, that RD is not really suitable for that cassette.
https://bike.shimano.com/en-EU/product/component/deore-m5100/RD-M5100-SGS.html