![Shimano 105 rear derailleur not tensioning chain in smallest 3 cogs. Issue began shortly after having derauiller hanger changed in LBS. All other gears work fine and shifting is good. : r/bikewrench Shimano 105 rear derailleur not tensioning chain in smallest 3 cogs. Issue began shortly after having derauiller hanger changed in LBS. All other gears work fine and shifting is good. : r/bikewrench](https://external-preview.redd.it/VbrhlkOTlVDiXQbelN5pnI0MTLE6yUupz6ftTe4iSpg.png?format=pjpg&auto=webp&s=1cd986d6fe030b0d63f383d6f120a8525c12b290)
Shimano 105 rear derailleur not tensioning chain in smallest 3 cogs. Issue began shortly after having derauiller hanger changed in LBS. All other gears work fine and shifting is good. : r/bikewrench
![Shimano 105 rear derailleur failed with a bang in 3 places at same time. Would fitting a new R7000 rear mech work with my 5800 shifters? : r/bikewrench Shimano 105 rear derailleur failed with a bang in 3 places at same time. Would fitting a new R7000 rear mech work with my 5800 shifters? : r/bikewrench](https://preview.redd.it/206xvfiiv7741.jpg?auto=webp&s=4d97437849ed232e215ac463bba35e22b6ee21ea)
Shimano 105 rear derailleur failed with a bang in 3 places at same time. Would fitting a new R7000 rear mech work with my 5800 shifters? : r/bikewrench
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