The Deore M6100 Shadow Plus 12-speed rear derailleur delivers excellent value and reliable shifting performance. While the SLX and XT options may be more eye-catching, the Deore's performance is very similar, making it the preferred choice for many. The Shadow Plus design ensures a low profile and optimized slant angle for smooth shifting. It also includes a chain stabilizing switch to reduce chain bounce on rough terrain, providing a more stable drive and shifting experience. Additionally, the single tension spring prevents contact with the chainstay, resulting in a quieter ride. Features: 13T pulleys, decreasing derailleur tension prevent high chain tension in low gears Direct cable routing prevents snagging from any trail side hazards Cold forged wide alloy links and pivot body Fluorine-coated link pin bushings Strong return spring for a positive shifting feel Top normal spring uses the spring to select higher gears Max low sprocket: 51T (1x 12-speed)