Frankly, I’m kind of surprised that it took almost 2 years since Shimano ‘reinvented‘ (renaming everything below Deore ...

Rear derailleur: “The 12-speed Shimano Deore rear derailleur (RD-M6100-SGS ... The new Alivio M3100 series still comes in a 2×9-speed or 3×9-speed variation with new shifters, derailleurs and ...

Buying a high-quality 10-speed mountain bike derailleur from a decade ago, say, a Shimano Deore XT RD-M786 SGS, doesn't actually cost any more than what you'd spend on eBay buying a Deore XT rear ...