evo.com | Shimano Rear Derailleurs > With a Shimano XT RD-M8100 12-Speed Rear Derailleur in charge of your shifts, it doesn't matter if you hit the bottom of a climb out at the smaller end of your cassette: a couple clicks of the lever and you'll be spinning uphill in your 51 tooth pie plate without a care in the world. Known for crisp shifting-even when you're putting the power down-an XT rear derailleur is always a fine choice. Compatible with Shimano 12-Speed Drivetrains Shadow Clutch Externally adjustable clutch for easier spring tension adjustment. Reduces chain slap and dropped chains, on-off switch allows for simple wheel changes. Stronger Return Spring for Crisp Shift Feeling Shadow+ Chain Stabilizer Provides a simple, lightweight chain control solution. Fast and Shockless Shifting | Shimano XT RD-M8100 12-Speed Rear Derailleur 2022 - Long Cage