Shimano XT RD-M8120 Rear Derailleur in Black - Size: SGS/12-Speed
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From SteepandCheap.com
The last time we saw an update to Shimano's workhorse XT group was back in 2015 when they made the switch to 11-speed. Fast forward four years and XT gets another refresh, so it comes as no surprise that Shimano's new XT RD-M8120 Rear Derailleur makes the move to 12-speed, along with other refinements that improve shifting performance while bringing a new level of silence to your drivetrain. These changes start with larger 13t pulleys that increase chain wrap, resulting in greater efficiency and better chain management. The XT derailleur is also quieter thanks to decreased tension in the low gears and an added bumper on the pulley cage that keeps things silent in rough terrain.